diff --git a/vendor/github.com/pierrec/lz4/.gitignore b/vendor/github.com/pierrec/lz4/.gitignore
index e48bab3..5e98735 100644
--- a/vendor/github.com/pierrec/lz4/.gitignore
+++ b/vendor/github.com/pierrec/lz4/.gitignore
@@ -30,4 +30,5 @@
 
 # End of https://www.gitignore.io/api/macos
 
-lz4c/lz4c
+cmd/*/*exe
+.idea
\ No newline at end of file
diff --git a/vendor/github.com/pierrec/lz4/.travis.yml b/vendor/github.com/pierrec/lz4/.travis.yml
index 658910d..9028ee8 100644
--- a/vendor/github.com/pierrec/lz4/.travis.yml
+++ b/vendor/github.com/pierrec/lz4/.travis.yml
@@ -8,6 +8,7 @@
   - 1.9.x
   - 1.10.x
   - 1.11.x
+  - 1.12.x
   - master
 
 matrix:
diff --git a/vendor/github.com/pierrec/lz4/README.md b/vendor/github.com/pierrec/lz4/README.md
index 50a10ee..00899fb 100644
--- a/vendor/github.com/pierrec/lz4/README.md
+++ b/vendor/github.com/pierrec/lz4/README.md
@@ -1,24 +1,105 @@
-[![godoc](https://godoc.org/github.com/pierrec/lz4?status.png)](https://godoc.org/github.com/pierrec/lz4)
+# lz4 : LZ4 compression in pure Go
 
-# lz4
-LZ4 compression and decompression in pure Go.
+[![GoDoc](https://godoc.org/github.com/pierrec/lz4?status.svg)](https://godoc.org/github.com/pierrec/lz4)
+[![Build Status](https://travis-ci.org/pierrec/lz4.svg?branch=master)](https://travis-ci.org/pierrec/lz4)
+[![Go Report Card](https://goreportcard.com/badge/github.com/pierrec/lz4)](https://goreportcard.com/report/github.com/pierrec/lz4)
+[![GitHub tag (latest SemVer)](https://img.shields.io/github/tag/pierrec/lz4.svg?style=social)](https://github.com/pierrec/lz4/tags)
 
-## Usage
+## Overview
 
-```go
-import "github.com/pierrec/lz4"
+This package provides a streaming interface to [LZ4 data streams](http://fastcompression.blogspot.fr/2013/04/lz4-streaming-format-final.html) as well as low level compress and uncompress functions for LZ4 data blocks.
+The implementation is based on the reference C [one](https://github.com/lz4/lz4).
+
+## Install
+
+Assuming you have the go toolchain installed:
+
+```
+go get github.com/pierrec/lz4
 ```
 
-## Description
-Package lz4 implements reading and writing lz4 compressed data (a frame),
-as specified in http://fastcompression.blogspot.fr/2013/04/lz4-streaming-format-final.html.
+There is a command line interface tool to compress and decompress LZ4 files.
 
-This package is **compatible with the LZ4 frame format** although the block level compression 
-and decompression functions are exposed and are fully compatible with the lz4 block format 
-definition, they are low level and should not be used directly.
+```
+go install github.com/pierrec/lz4/cmd/lz4c
+```
 
-For a complete description of an lz4 compressed block, see:
-http://fastcompression.blogspot.fr/2011/05/lz4-explained.html
+Usage
 
-See https://github.com/Cyan4973/lz4 for the reference C implementation.
+```
+Usage of lz4c:
+  -version
+        print the program version
 
+Subcommands:
+Compress the given files or from stdin to stdout.
+compress [arguments] [<file name> ...]
+  -bc
+        enable block checksum
+  -l int
+        compression level (0=fastest)
+  -sc
+        disable stream checksum
+  -size string
+        block max size [64K,256K,1M,4M] (default "4M")
+
+Uncompress the given files or from stdin to stdout.
+uncompress [arguments] [<file name> ...]
+
+```
+
+
+## Example
+
+```
+// Compress and uncompress an input string.
+s := "hello world"
+r := strings.NewReader(s)
+
+// The pipe will uncompress the data from the writer.
+pr, pw := io.Pipe()
+zw := lz4.NewWriter(pw)
+zr := lz4.NewReader(pr)
+
+go func() {
+	// Compress the input string.
+	_, _ = io.Copy(zw, r)
+	_ = zw.Close() // Make sure the writer is closed
+	_ = pw.Close() // Terminate the pipe
+}()
+
+_, _ = io.Copy(os.Stdout, zr)
+
+// Output:
+// hello world
+```
+
+## Contributing
+
+Contributions are very welcome for bug fixing, performance improvements...!
+
+- Open an issue with a proper description
+- Send a pull request with appropriate test case(s)
+
+## Contributors
+
+Thanks to all contributors so far:
+
+- [@klauspost](https://github.com/klauspost)
+- [@heidawei](https://github.com/heidawei)
+- [@x4m](https://github.com/x4m)
+- [@Zariel](https://github.com/Zariel)
+- [@edwingeng](https://github.com/edwingeng)
+- [@danielmoy-google](https://github.com/danielmoy-google)
+- [@honda-tatsuya](https://github.com/honda-tatsuya)
+- [@h8liu](https://github.com/h8liu)
+- [@sbinet](https://github.com/sbinet)
+- [@fingon](https://github.com/fingon)
+- [@emfree](https://github.com/emfree)
+- [@lhemala](https://github.com/lhemala)
+- [@connor4312](https://github.com/connor4312)
+- [@oov](https://github.com/oov)
+- [@arya](https://github.com/arya)
+- [@ikkeps](https://github.com/ikkeps)
+
+Special thanks to [@Zariel](https://github.com/Zariel) for his asm implementation of the decoder
diff --git a/vendor/github.com/pierrec/lz4/block.go b/vendor/github.com/pierrec/lz4/block.go
index d96e0e7..90831a4 100644
--- a/vendor/github.com/pierrec/lz4/block.go
+++ b/vendor/github.com/pierrec/lz4/block.go
@@ -2,15 +2,7 @@
 
 import (
 	"encoding/binary"
-	"errors"
-)
-
-var (
-	// ErrInvalidSourceShortBuffer is returned by UncompressBlock or CompressBLock when a compressed
-	// block is corrupted or the destination buffer is not large enough for the uncompressed data.
-	ErrInvalidSourceShortBuffer = errors.New("lz4: invalid source or destination buffer too short")
-	// ErrInvalid is returned when reading an invalid LZ4 archive.
-	ErrInvalid = errors.New("lz4: bad magic number")
+	"math/bits"
 )
 
 // blockHash hashes 4 bytes into a value < winSize.
@@ -30,17 +22,14 @@
 // The destination buffer must be sized appropriately.
 //
 // An error is returned if the source data is invalid or the destination buffer is too small.
-func UncompressBlock(src, dst []byte) (di int, err error) {
-	sn := len(src)
-	if sn == 0 {
+func UncompressBlock(src, dst []byte) (int, error) {
+	if len(src) == 0 {
 		return 0, nil
 	}
-
-	di = decodeBlock(dst, src)
-	if di < 0 {
-		return 0, ErrInvalidSourceShortBuffer
+	if di := decodeBlock(dst, src); di >= 0 {
+		return di, nil
 	}
-	return di, nil
+	return 0, ErrInvalidSourceShortBuffer
 }
 
 // CompressBlock compresses the source buffer into the destination one.
@@ -51,11 +40,12 @@
 //
 // An error is returned if the destination buffer is too small.
 func CompressBlock(src, dst []byte, hashTable []int) (di int, err error) {
-	defer func() {
-		if recover() != nil {
-			err = ErrInvalidSourceShortBuffer
-		}
-	}()
+	defer recoverBlock(&err)
+
+	// adaptSkipLog sets how quickly the compressor begins skipping blocks when data is incompressible.
+	// This significantly speeds up incompressible data and usually has very small impact on compresssion.
+	// bytes to skip =  1 + (bytes since last match >> adaptSkipLog)
+	const adaptSkipLog = 7
 
 	sn, dn := len(src)-mfLimit, len(dst)
 	if sn <= 0 || dn == 0 {
@@ -64,10 +54,8 @@
 	var si int
 
 	// Fast scan strategy: the hash table only stores the last 4 bytes sequences.
-	// const accInit = 1 << skipStrength
 
 	anchor := si // Position of the current literals.
-	// acc := accInit // Variable step: improves performance on non-compressible data.
 
 	for si < sn {
 		// Hash the next 4 bytes (sequence)...
@@ -77,15 +65,13 @@
 		ref := hashTable[h]
 		hashTable[h] = si
 		if ref >= sn { // Invalid reference (dirty hashtable).
-			si++
+			si += 1 + (si-anchor)>>adaptSkipLog
 			continue
 		}
 		offset := si - ref
 		if offset <= 0 || offset >= winSize || // Out of window.
 			match != binary.LittleEndian.Uint32(src[ref:]) { // Hash collision on different matches.
-			// si += acc >> skipStrength
-			// acc++
-			si++
+			si += 1 + (si-anchor)>>adaptSkipLog
 			continue
 		}
 
@@ -97,12 +83,15 @@
 		si += minMatch
 		mLen := si // Match length has minMatch already.
 		// Find the longest match, first looking by batches of 8 bytes.
-		for si < sn && binary.LittleEndian.Uint64(src[si:]) == binary.LittleEndian.Uint64(src[si-offset:]) {
-			si += 8
-		}
-		// Then byte by byte.
-		for si < sn && src[si] == src[si-offset] {
-			si++
+		for si < sn {
+			x := binary.LittleEndian.Uint64(src[si:]) ^ binary.LittleEndian.Uint64(src[si-offset:])
+			if x == 0 {
+				si += 8
+			} else {
+				// Stop is first non-zero byte.
+				si += bits.TrailingZeros64(x) >> 3
+				break
+			}
 		}
 
 		mLen = si - mLen
@@ -185,11 +174,12 @@
 //
 // An error is returned if the destination buffer is too small.
 func CompressBlockHC(src, dst []byte, depth int) (di int, err error) {
-	defer func() {
-		if recover() != nil {
-			err = ErrInvalidSourceShortBuffer
-		}
-	}()
+	defer recoverBlock(&err)
+
+	// adaptSkipLog sets how quickly the compressor begins skipping blocks when data is incompressible.
+	// This significantly speeds up incompressible data and usually has very small impact on compresssion.
+	// bytes to skip =  1 + (bytes since last match >> adaptSkipLog)
+	const adaptSkipLog = 7
 
 	sn, dn := len(src)-mfLimit, len(dst)
 	if sn <= 0 || dn == 0 {
@@ -198,7 +188,7 @@
 	var si int
 
 	// hashTable: stores the last position found for a given hash
-	// chaingTable: stores previous positions for a given hash
+	// chainTable: stores previous positions for a given hash
 	var hashTable, chainTable [winSize]int
 
 	if depth <= 0 {
@@ -222,11 +212,15 @@
 			}
 			ml := 0
 			// Compare the current position with a previous with the same hash.
-			for ml < sn-si && binary.LittleEndian.Uint64(src[next+ml:]) == binary.LittleEndian.Uint64(src[si+ml:]) {
-				ml += 8
-			}
-			for ml < sn-si && src[next+ml] == src[si+ml] {
-				ml++
+			for ml < sn-si {
+				x := binary.LittleEndian.Uint64(src[next+ml:]) ^ binary.LittleEndian.Uint64(src[si+ml:])
+				if x == 0 {
+					ml += 8
+				} else {
+					// Stop is first non-zero byte.
+					ml += bits.TrailingZeros64(x) >> 3
+					break
+				}
 			}
 			if ml < minMatch || ml <= mLen {
 				// Match too small (<minMath) or smaller than the current match.
@@ -243,7 +237,7 @@
 
 		// No match found.
 		if mLen == 0 {
-			si++
+			si += 1 + (si-anchor)>>adaptSkipLog
 			continue
 		}
 
diff --git a/vendor/github.com/pierrec/lz4/decode_other.go b/vendor/github.com/pierrec/lz4/decode_other.go
index b83a19a..002519f 100644
--- a/vendor/github.com/pierrec/lz4/decode_other.go
+++ b/vendor/github.com/pierrec/lz4/decode_other.go
@@ -3,11 +3,10 @@
 package lz4
 
 func decodeBlock(dst, src []byte) (ret int) {
+	const hasError = -2
 	defer func() {
-		// It is now faster to let the runtime panic and recover on out of bound slice access
-		// than checking indices as we go along.
 		if recover() != nil {
-			ret = -2
+			ret = hasError
 		}
 	}()
 
@@ -61,7 +60,7 @@
 
 		offset := int(src[si]) | int(src[si+1])<<8
 		if offset == 0 {
-			return -2
+			return hasError
 		}
 		si += 2
 
@@ -90,6 +89,4 @@
 		}
 		di += copy(dst[di:di+mLen], expanded[:mLen])
 	}
-
-	return di
 }
diff --git a/vendor/github.com/pierrec/lz4/errors.go b/vendor/github.com/pierrec/lz4/errors.go
new file mode 100644
index 0000000..71a5a38
--- /dev/null
+++ b/vendor/github.com/pierrec/lz4/errors.go
@@ -0,0 +1,19 @@
+package lz4
+
+import "errors"
+
+var (
+	// ErrInvalidSourceShortBuffer is returned by UncompressBlock or CompressBLock when a compressed
+	// block is corrupted or the destination buffer is not large enough for the uncompressed data.
+	ErrInvalidSourceShortBuffer = errors.New("lz4: invalid source or destination buffer too short")
+	// ErrInvalid is returned when reading an invalid LZ4 archive.
+	ErrInvalid = errors.New("lz4: bad magic number")
+	// ErrBlockDependency is returned when attempting to decompress an archive created with block dependency.
+	ErrBlockDependency = errors.New("lz4: block dependency not supported")
+)
+
+func recoverBlock(e *error) {
+	if recover() != nil && *e == nil {
+		*e = ErrInvalidSourceShortBuffer
+	}
+}
diff --git a/vendor/github.com/pierrec/lz4/go.mod b/vendor/github.com/pierrec/lz4/go.mod
index f9f570a..96090c6 100644
--- a/vendor/github.com/pierrec/lz4/go.mod
+++ b/vendor/github.com/pierrec/lz4/go.mod
@@ -1,3 +1,12 @@
 module github.com/pierrec/lz4
 
-require github.com/pkg/profile v1.2.1
+require (
+	code.cloudfoundry.org/bytefmt v0.0.0-20180906201452-2aa6f33b730c
+	github.com/frankban/quicktest v1.4.0
+	github.com/onsi/ginkgo v1.8.0 // indirect
+	github.com/onsi/gomega v1.5.0 // indirect
+	github.com/pierrec/cmdflag v0.0.2
+	github.com/schollz/progressbar/v2 v2.12.1
+	golang.org/x/net v0.0.0-20190311183353-d8887717615a // indirect
+	golang.org/x/sync v0.0.0-20190423024810-112230192c58 // indirect
+)
diff --git a/vendor/github.com/pierrec/lz4/go.sum b/vendor/github.com/pierrec/lz4/go.sum
index 6ca7598..4f1dab3 100644
--- a/vendor/github.com/pierrec/lz4/go.sum
+++ b/vendor/github.com/pierrec/lz4/go.sum
@@ -1,2 +1,57 @@
-github.com/pkg/profile v1.2.1 h1:F++O52m40owAmADcojzM+9gyjmMOY/T4oYJkgFDH8RE=
-github.com/pkg/profile v1.2.1/go.mod h1:hJw3o1OdXxsrSjjVksARp5W95eeEaEfptyVZyv6JUPA=
+code.cloudfoundry.org/bytefmt v0.0.0-20180906201452-2aa6f33b730c h1:VzwteSWGbW9mxXTEkH+kpnao5jbgLynw3hq742juQh8=
+code.cloudfoundry.org/bytefmt v0.0.0-20180906201452-2aa6f33b730c/go.mod h1:wN/zk7mhREp/oviagqUXY3EwuHhWyOvAdsn5Y4CzOrc=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/frankban/quicktest v1.4.0 h1:rCSCih1FnSWJEel/eub9wclBSqpF2F/PuvxUWGWnbO8=
+github.com/frankban/quicktest v1.4.0/go.mod h1:36zfPVQyHxymz4cH7wlDmVwDrJuljRB60qkgn7rorfQ=
+github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
+github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
+github.com/golang/protobuf v1.2.0 h1:P3YflyNX/ehuJFLhxviNdFxQPkGK5cDcApsge1SqnvM=
+github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/google/go-cmp v0.3.0 h1:crn/baboCvb5fXaQ0IJ1SGTsTVrWpDsCWC8EGETZijY=
+github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
+github.com/hpcloud/tail v1.0.0 h1:nfCOvKYfkgYP8hkirhJocXT2+zOD8yUNjXaWfTlyFKI=
+github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
+github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
+github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
+github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
+github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
+github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
+github.com/mitchellh/colorstring v0.0.0-20190213212951-d06e56a500db h1:62I3jR2EmQ4l5rM/4FEfDWcRD+abF5XlKShorW5LRoQ=
+github.com/mitchellh/colorstring v0.0.0-20190213212951-d06e56a500db/go.mod h1:l0dey0ia/Uv7NcFFVbCLtqEBQbrT4OCwCSKTEv6enCw=
+github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
+github.com/onsi/ginkgo v1.8.0 h1:VkHVNpR4iVnU8XQR6DBm8BqYjN7CRzw+xKUbVVbbW9w=
+github.com/onsi/ginkgo v1.8.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
+github.com/onsi/gomega v1.5.0 h1:izbySO9zDPmjJ8rDjLvkA2zJHIo+HkYXHnf7eN7SSyo=
+github.com/onsi/gomega v1.5.0/go.mod h1:ex+gbHU/CVuBBDIJjb2X0qEXbFg53c61hWP/1CpauHY=
+github.com/pierrec/cmdflag v0.0.2 h1:ybjGJnPr/aURn2IKWjO49znx9N0DL6YfGsIxN0PYuVY=
+github.com/pierrec/cmdflag v0.0.2/go.mod h1:a3zKGZ3cdQUfxjd0RGMLZr8xI3nvpJOB+m6o/1X5BmU=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/schollz/progressbar/v2 v2.12.1 h1:0Ce7IBClG+s3lxXN1Noqwh7aToKGL5a3mnMfPJqDlv4=
+github.com/schollz/progressbar/v2 v2.12.1/go.mod h1:fBI3onORwtNtwCWJHsrXtjE3QnJOtqIZrvr3rDaF7L0=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
+github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/net v0.0.0-20190311183353-d8887717615a h1:oWX7TPOiFAMXLq8o0ikBYfCJVlRHBcsciT5bXOrH628=
+golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20190423024810-112230192c58 h1:8gQV6CLnAEikrhgkHFbMAEhagSSnXWGV915qUMm9mrU=
+golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a h1:1BGLXjeY4akVXGgbC9HugT3Jv3hCI0z56oJR5vAMgBU=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/fsnotify.v1 v1.4.7 h1:xOHLXZwVvI9hhs+cLKq5+I5onOuwQLhQwiu63xxlHs4=
+gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
+gopkg.in/yaml.v2 v2.2.1 h1:mUhvW9EsL+naU5Q3cakzfE91YhliOondGd6ZrsDBHQE=
+gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
diff --git a/vendor/github.com/pierrec/lz4/internal/xxh32/xxh32zero.go b/vendor/github.com/pierrec/lz4/internal/xxh32/xxh32zero.go
index 850a6fd..7a76a6b 100644
--- a/vendor/github.com/pierrec/lz4/internal/xxh32/xxh32zero.go
+++ b/vendor/github.com/pierrec/lz4/internal/xxh32/xxh32zero.go
@@ -7,14 +7,15 @@
 )
 
 const (
-	prime32_1 uint32 = 2654435761
-	prime32_2 uint32 = 2246822519
-	prime32_3 uint32 = 3266489917
-	prime32_4 uint32 = 668265263
-	prime32_5 uint32 = 374761393
+	prime1 uint32 = 2654435761
+	prime2 uint32 = 2246822519
+	prime3 uint32 = 3266489917
+	prime4 uint32 = 668265263
+	prime5 uint32 = 374761393
 
-	prime32_1plus2 uint32 = 606290984
-	prime32_minus1 uint32 = 1640531535
+	primeMask   = 0xFFFFFFFF
+	prime1plus2 = uint32((uint64(prime1) + uint64(prime2)) & primeMask) // 606290984
+	prime1minus = uint32((-int64(prime1)) & primeMask)                  // 1640531535
 )
 
 // XXHZero represents an xxhash32 object with seed 0.
@@ -37,10 +38,10 @@
 
 // Reset resets the Hash to its initial state.
 func (xxh *XXHZero) Reset() {
-	xxh.v1 = prime32_1plus2
-	xxh.v2 = prime32_2
+	xxh.v1 = prime1plus2
+	xxh.v2 = prime2
 	xxh.v3 = 0
-	xxh.v4 = prime32_minus1
+	xxh.v4 = prime1minus
 	xxh.totalLen = 0
 	xxh.bufused = 0
 }
@@ -83,20 +84,20 @@
 
 		// fast rotl(13)
 		buf := xxh.buf[:16] // BCE hint.
-		v1 = rol13(v1+binary.LittleEndian.Uint32(buf[:])*prime32_2) * prime32_1
-		v2 = rol13(v2+binary.LittleEndian.Uint32(buf[4:])*prime32_2) * prime32_1
-		v3 = rol13(v3+binary.LittleEndian.Uint32(buf[8:])*prime32_2) * prime32_1
-		v4 = rol13(v4+binary.LittleEndian.Uint32(buf[12:])*prime32_2) * prime32_1
+		v1 = rol13(v1+binary.LittleEndian.Uint32(buf[:])*prime2) * prime1
+		v2 = rol13(v2+binary.LittleEndian.Uint32(buf[4:])*prime2) * prime1
+		v3 = rol13(v3+binary.LittleEndian.Uint32(buf[8:])*prime2) * prime1
+		v4 = rol13(v4+binary.LittleEndian.Uint32(buf[12:])*prime2) * prime1
 		p = r
 		xxh.bufused = 0
 	}
 
 	for n := n - 16; p <= n; p += 16 {
 		sub := input[p:][:16] //BCE hint for compiler
-		v1 = rol13(v1+binary.LittleEndian.Uint32(sub[:])*prime32_2) * prime32_1
-		v2 = rol13(v2+binary.LittleEndian.Uint32(sub[4:])*prime32_2) * prime32_1
-		v3 = rol13(v3+binary.LittleEndian.Uint32(sub[8:])*prime32_2) * prime32_1
-		v4 = rol13(v4+binary.LittleEndian.Uint32(sub[12:])*prime32_2) * prime32_1
+		v1 = rol13(v1+binary.LittleEndian.Uint32(sub[:])*prime2) * prime1
+		v2 = rol13(v2+binary.LittleEndian.Uint32(sub[4:])*prime2) * prime1
+		v3 = rol13(v3+binary.LittleEndian.Uint32(sub[8:])*prime2) * prime1
+		v4 = rol13(v4+binary.LittleEndian.Uint32(sub[12:])*prime2) * prime1
 	}
 	xxh.v1, xxh.v2, xxh.v3, xxh.v4 = v1, v2, v3, v4
 
@@ -112,25 +113,25 @@
 	if h32 >= 16 {
 		h32 += rol1(xxh.v1) + rol7(xxh.v2) + rol12(xxh.v3) + rol18(xxh.v4)
 	} else {
-		h32 += prime32_5
+		h32 += prime5
 	}
 
 	p := 0
 	n := xxh.bufused
 	buf := xxh.buf
 	for n := n - 4; p <= n; p += 4 {
-		h32 += binary.LittleEndian.Uint32(buf[p:p+4]) * prime32_3
-		h32 = rol17(h32) * prime32_4
+		h32 += binary.LittleEndian.Uint32(buf[p:p+4]) * prime3
+		h32 = rol17(h32) * prime4
 	}
 	for ; p < n; p++ {
-		h32 += uint32(buf[p]) * prime32_5
-		h32 = rol11(h32) * prime32_1
+		h32 += uint32(buf[p]) * prime5
+		h32 = rol11(h32) * prime1
 	}
 
 	h32 ^= h32 >> 15
-	h32 *= prime32_2
+	h32 *= prime2
 	h32 ^= h32 >> 13
-	h32 *= prime32_3
+	h32 *= prime3
 	h32 ^= h32 >> 16
 
 	return h32
@@ -142,19 +143,19 @@
 	h32 := uint32(n)
 
 	if n < 16 {
-		h32 += prime32_5
+		h32 += prime5
 	} else {
-		v1 := prime32_1plus2
-		v2 := prime32_2
+		v1 := prime1plus2
+		v2 := prime2
 		v3 := uint32(0)
-		v4 := prime32_minus1
+		v4 := prime1minus
 		p := 0
 		for n := n - 16; p <= n; p += 16 {
 			sub := input[p:][:16] //BCE hint for compiler
-			v1 = rol13(v1+binary.LittleEndian.Uint32(sub[:])*prime32_2) * prime32_1
-			v2 = rol13(v2+binary.LittleEndian.Uint32(sub[4:])*prime32_2) * prime32_1
-			v3 = rol13(v3+binary.LittleEndian.Uint32(sub[8:])*prime32_2) * prime32_1
-			v4 = rol13(v4+binary.LittleEndian.Uint32(sub[12:])*prime32_2) * prime32_1
+			v1 = rol13(v1+binary.LittleEndian.Uint32(sub[:])*prime2) * prime1
+			v2 = rol13(v2+binary.LittleEndian.Uint32(sub[4:])*prime2) * prime1
+			v3 = rol13(v3+binary.LittleEndian.Uint32(sub[8:])*prime2) * prime1
+			v4 = rol13(v4+binary.LittleEndian.Uint32(sub[12:])*prime2) * prime1
 		}
 		input = input[p:]
 		n -= p
@@ -163,19 +164,19 @@
 
 	p := 0
 	for n := n - 4; p <= n; p += 4 {
-		h32 += binary.LittleEndian.Uint32(input[p:p+4]) * prime32_3
-		h32 = rol17(h32) * prime32_4
+		h32 += binary.LittleEndian.Uint32(input[p:p+4]) * prime3
+		h32 = rol17(h32) * prime4
 	}
 	for p < n {
-		h32 += uint32(input[p]) * prime32_5
-		h32 = rol11(h32) * prime32_1
+		h32 += uint32(input[p]) * prime5
+		h32 = rol11(h32) * prime1
 		p++
 	}
 
 	h32 ^= h32 >> 15
-	h32 *= prime32_2
+	h32 *= prime2
 	h32 ^= h32 >> 13
-	h32 *= prime32_3
+	h32 *= prime3
 	h32 ^= h32 >> 16
 
 	return h32
@@ -183,12 +184,12 @@
 
 // Uint32Zero hashes x with seed 0.
 func Uint32Zero(x uint32) uint32 {
-	h := prime32_5 + 4 + x*prime32_3
-	h = rol17(h) * prime32_4
+	h := prime5 + 4 + x*prime3
+	h = rol17(h) * prime4
 	h ^= h >> 15
-	h *= prime32_2
+	h *= prime2
 	h ^= h >> 13
-	h *= prime32_3
+	h *= prime3
 	h ^= h >> 16
 	return h
 }
diff --git a/vendor/github.com/pierrec/lz4/lz4.go b/vendor/github.com/pierrec/lz4/lz4.go
index 3580275..8c26412 100644
--- a/vendor/github.com/pierrec/lz4/lz4.go
+++ b/vendor/github.com/pierrec/lz4/lz4.go
@@ -31,26 +31,24 @@
 	// Its value influences the compression speed and memory usage, the lower the faster,
 	// but at the expense of the compression ratio.
 	// 16 seems to be the best compromise.
-	hashLog       = 16
-	hashTableSize = 1 << hashLog
-	hashShift     = uint((minMatch * 8) - hashLog)
+	hashLog   = 16
+	hashShift = uint((minMatch * 8) - hashLog)
 
-	mfLimit      = 8 + minMatch // The last match cannot start within the last 12 bytes.
-	skipStrength = 6            // variable step for fast scan
+	mfLimit = 8 + minMatch // The last match cannot start within the last 12 bytes.
 )
 
 // map the block max size id with its value in bytes: 64Kb, 256Kb, 1Mb and 4Mb.
-var (
-	bsMapID    = map[byte]int{4: 64 << 10, 5: 256 << 10, 6: 1 << 20, 7: 4 << 20}
-	bsMapValue = make(map[int]byte, len(bsMapID))
+const (
+	blockSize64K  = 64 << 10
+	blockSize256K = 256 << 10
+	blockSize1M   = 1 << 20
+	blockSize4M   = 4 << 20
 )
 
-// Reversed.
-func init() {
-	for i, v := range bsMapID {
-		bsMapValue[v] = i
-	}
-}
+var (
+	bsMapID    = map[byte]int{4: blockSize64K, 5: blockSize256K, 6: blockSize1M, 7: blockSize4M}
+	bsMapValue = map[int]byte{blockSize64K: 4, blockSize256K: 5, blockSize1M: 6, blockSize4M: 7}
+)
 
 // Header describes the various flags that can be set on a Writer or obtained from a Reader.
 // The default values match those of the LZ4 frame format definition
diff --git a/vendor/github.com/pierrec/lz4/reader.go b/vendor/github.com/pierrec/lz4/reader.go
index 81efdbf..90e8efe 100644
--- a/vendor/github.com/pierrec/lz4/reader.go
+++ b/vendor/github.com/pierrec/lz4/reader.go
@@ -14,6 +14,9 @@
 // The Header may change between Read() calls in case of concatenated frames.
 type Reader struct {
 	Header
+	// Handler called when a block has been successfully read.
+	// It provides the number of bytes read.
+	OnBlockDone func(size int)
 
 	buf      [8]byte       // Scrap buffer.
 	pos      int64         // Current position in src.
@@ -76,7 +79,7 @@
 		return fmt.Errorf("lz4: invalid version: got %d; expected %d", v, Version)
 	}
 	if b>>5&1 == 0 {
-		return fmt.Errorf("lz4: block dependency not supported")
+		return ErrBlockDependency
 	}
 	z.BlockChecksum = b>>4&1 > 0
 	frameSize := b>>3&1 > 0
@@ -101,7 +104,7 @@
 	z.data = z.zdata[:cap(z.zdata)][bSize:]
 	z.idx = len(z.data)
 
-	z.checksum.Write(buf[0:2])
+	_, _ = z.checksum.Write(buf[0:2])
 
 	if frameSize {
 		buf := buf[:8]
@@ -110,7 +113,7 @@
 		}
 		z.Size = binary.LittleEndian.Uint64(buf)
 		z.pos += 8
-		z.checksum.Write(buf)
+		_, _ = z.checksum.Write(buf)
 	}
 
 	// Header checksum.
@@ -211,6 +214,9 @@
 				return 0, err
 			}
 			z.pos += int64(bLen)
+			if z.OnBlockDone != nil {
+				z.OnBlockDone(int(bLen))
+			}
 
 			if z.BlockChecksum {
 				checksum, err := z.readUint32()
@@ -255,10 +261,13 @@
 				return 0, err
 			}
 			z.data = z.data[:n]
+			if z.OnBlockDone != nil {
+				z.OnBlockDone(n)
+			}
 		}
 
 		if !z.NoChecksum {
-			z.checksum.Write(z.data)
+			_, _ = z.checksum.Write(z.data)
 			if debugFlag {
 				debug("current frame checksum %x", z.checksum.Sum32())
 			}
diff --git a/vendor/github.com/pierrec/lz4/writer.go b/vendor/github.com/pierrec/lz4/writer.go
index 0120438..804a68c 100644
--- a/vendor/github.com/pierrec/lz4/writer.go
+++ b/vendor/github.com/pierrec/lz4/writer.go
@@ -11,6 +11,9 @@
 // Writer implements the LZ4 frame encoder.
 type Writer struct {
 	Header
+	// Handler called when a block has been successfully written out.
+	// It provides the number of bytes written.
+	OnBlockDone func(size int)
 
 	buf       [19]byte      // magic number(4) + header(flags(2)+[Size(8)+DictID(4)]+checksum(1)) does not exceed 19 bytes
 	dst       io.Writer     // Destination.
@@ -46,8 +49,8 @@
 	if n := 2 * bSize; cap(z.zdata) < n {
 		z.zdata = make([]byte, n, n)
 	}
-	z.zdata = z.zdata[:bSize]
-	z.data = z.zdata[:cap(z.zdata)][bSize:]
+	z.data = z.zdata[:bSize]
+	z.zdata = z.zdata[:cap(z.zdata)][bSize:]
 	z.idx = 0
 
 	// Size is optional.
@@ -182,24 +185,26 @@
 	if err := z.writeUint32(bLen); err != nil {
 		return err
 	}
-	if _, err := z.dst.Write(zdata); err != nil {
+	written, err := z.dst.Write(zdata)
+	if err != nil {
 		return err
 	}
+	if h := z.OnBlockDone; h != nil {
+		h(written)
+	}
 
-	if z.BlockChecksum {
-		checksum := xxh32.ChecksumZero(zdata)
+	if !z.BlockChecksum {
 		if debugFlag {
-			debug("block checksum %x", checksum)
+			debug("current frame checksum %x", z.checksum.Sum32())
 		}
-		if err := z.writeUint32(checksum); err != nil {
-			return err
-		}
+		return nil
 	}
+	checksum := xxh32.ChecksumZero(zdata)
 	if debugFlag {
-		debug("current frame checksum %x", z.checksum.Sum32())
+		debug("block checksum %x", checksum)
+		defer func() { debug("current frame checksum %x", z.checksum.Sum32()) }()
 	}
-
-	return nil
+	return z.writeUint32(checksum)
 }
 
 // Flush flushes any pending compressed data to the underlying writer.
@@ -213,7 +218,11 @@
 		return nil
 	}
 
-	return z.compressBlock(z.data[:z.idx])
+	if err := z.compressBlock(z.data[:z.idx]); err != nil {
+		return err
+	}
+	z.idx = 0
+	return nil
 }
 
 // Close closes the Writer, flushing any unwritten data to the underlying io.Writer, but does not close the underlying io.Writer.
@@ -223,7 +232,6 @@
 			return err
 		}
 	}
-
 	if err := z.Flush(); err != nil {
 		return err
 	}
@@ -234,16 +242,14 @@
 	if err := z.writeUint32(0); err != nil {
 		return err
 	}
-	if !z.NoChecksum {
-		checksum := z.checksum.Sum32()
-		if debugFlag {
-			debug("stream checksum %x", checksum)
-		}
-		if err := z.writeUint32(checksum); err != nil {
-			return err
-		}
+	if z.NoChecksum {
+		return nil
 	}
-	return nil
+	checksum := z.checksum.Sum32()
+	if debugFlag {
+		debug("stream checksum %x", checksum)
+	}
+	return z.writeUint32(checksum)
 }
 
 // Reset clears the state of the Writer z such that it is equivalent to its