diff --git a/vendor/github.com/klauspost/compress/zstd/enc_params.go b/vendor/github.com/klauspost/compress/zstd/enc_params.go
new file mode 100644
index 0000000..b6779ec
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/zstd/enc_params.go
@@ -0,0 +1,154 @@
+// Copyright 2019+ Klaus Post. All rights reserved.
+// License information can be found in the LICENSE file.
+// Based on work by Yann Collet, released under BSD License.
+
+package zstd
+
+type encParams struct {
+	// largest match distance : larger == more compression, more memory needed during decompression
+	windowLog uint8
+
+	// fully searched segment : larger == more compression, slower, more memory (useless for fast)
+	chainLog uint8
+
+	//  dispatch table : larger == faster, more memory
+	hashLog uint8
+
+	// < nb of searches : larger == more compression, slower
+	searchLog uint8
+
+	// < match length searched : larger == faster decompression, sometimes less compression
+	minMatch uint8
+
+	// acceptable match size for optimal parser (only) : larger == more compression, slower
+	targetLength uint32
+
+	// see ZSTD_strategy definition above
+	strategy strategy
+}
+
+// strategy defines the algorithm to use when generating sequences.
+type strategy uint8
+
+const (
+	// Compression strategies, listed from fastest to strongest
+	strategyFast strategy = iota + 1
+	strategyDfast
+	strategyGreedy
+	strategyLazy
+	strategyLazy2
+	strategyBtlazy2
+	strategyBtopt
+	strategyBtultra
+	strategyBtultra2
+	// note : new strategies _might_ be added in the future.
+	//   Only the order (from fast to strong) is guaranteed
+
+)
+
+var defEncParams = [4][]encParams{
+	{ // "default" - for any srcSize > 256 KB
+		// W,  C,  H,  S,  L, TL, strat
+		{19, 12, 13, 1, 6, 1, strategyFast},       // base for negative levels
+		{19, 13, 14, 1, 7, 0, strategyFast},       // level  1
+		{20, 15, 16, 1, 6, 0, strategyFast},       // level  2
+		{21, 16, 17, 1, 5, 1, strategyDfast},      // level  3
+		{21, 18, 18, 1, 5, 1, strategyDfast},      // level  4
+		{21, 18, 19, 2, 5, 2, strategyGreedy},     // level  5
+		{21, 19, 19, 3, 5, 4, strategyGreedy},     // level  6
+		{21, 19, 19, 3, 5, 8, strategyLazy},       // level  7
+		{21, 19, 19, 3, 5, 16, strategyLazy2},     // level  8
+		{21, 19, 20, 4, 5, 16, strategyLazy2},     // level  9
+		{22, 20, 21, 4, 5, 16, strategyLazy2},     // level 10
+		{22, 21, 22, 4, 5, 16, strategyLazy2},     // level 11
+		{22, 21, 22, 5, 5, 16, strategyLazy2},     // level 12
+		{22, 21, 22, 5, 5, 32, strategyBtlazy2},   // level 13
+		{22, 22, 23, 5, 5, 32, strategyBtlazy2},   // level 14
+		{22, 23, 23, 6, 5, 32, strategyBtlazy2},   // level 15
+		{22, 22, 22, 5, 5, 48, strategyBtopt},     // level 16
+		{23, 23, 22, 5, 4, 64, strategyBtopt},     // level 17
+		{23, 23, 22, 6, 3, 64, strategyBtultra},   // level 18
+		{23, 24, 22, 7, 3, 256, strategyBtultra2}, // level 19
+		{25, 25, 23, 7, 3, 256, strategyBtultra2}, // level 20
+		{26, 26, 24, 7, 3, 512, strategyBtultra2}, // level 21
+		{27, 27, 25, 9, 3, 999, strategyBtultra2}, // level 22
+	},
+	{ // for srcSize <= 256 KB
+		// W,  C,  H,  S,  L,  T, strat
+		{18, 12, 13, 1, 5, 1, strategyFast},        // base for negative levels
+		{18, 13, 14, 1, 6, 0, strategyFast},        // level  1
+		{18, 14, 14, 1, 5, 1, strategyDfast},       // level  2
+		{18, 16, 16, 1, 4, 1, strategyDfast},       // level  3
+		{18, 16, 17, 2, 5, 2, strategyGreedy},      // level  4.
+		{18, 18, 18, 3, 5, 2, strategyGreedy},      // level  5.
+		{18, 18, 19, 3, 5, 4, strategyLazy},        // level  6.
+		{18, 18, 19, 4, 4, 4, strategyLazy},        // level  7
+		{18, 18, 19, 4, 4, 8, strategyLazy2},       // level  8
+		{18, 18, 19, 5, 4, 8, strategyLazy2},       // level  9
+		{18, 18, 19, 6, 4, 8, strategyLazy2},       // level 10
+		{18, 18, 19, 5, 4, 12, strategyBtlazy2},    // level 11.
+		{18, 19, 19, 7, 4, 12, strategyBtlazy2},    // level 12.
+		{18, 18, 19, 4, 4, 16, strategyBtopt},      // level 13
+		{18, 18, 19, 4, 3, 32, strategyBtopt},      // level 14.
+		{18, 18, 19, 6, 3, 128, strategyBtopt},     // level 15.
+		{18, 19, 19, 6, 3, 128, strategyBtultra},   // level 16.
+		{18, 19, 19, 8, 3, 256, strategyBtultra},   // level 17.
+		{18, 19, 19, 6, 3, 128, strategyBtultra2},  // level 18.
+		{18, 19, 19, 8, 3, 256, strategyBtultra2},  // level 19.
+		{18, 19, 19, 10, 3, 512, strategyBtultra2}, // level 20.
+		{18, 19, 19, 12, 3, 512, strategyBtultra2}, // level 21.
+		{18, 19, 19, 13, 3, 999, strategyBtultra2}, // level 22.
+	},
+	{ // for srcSize <= 128 KB
+		// W,  C,  H,  S,  L,  T, strat
+		{17, 12, 12, 1, 5, 1, strategyFast},        // base for negative levels
+		{17, 12, 13, 1, 6, 0, strategyFast},        // level  1
+		{17, 13, 15, 1, 5, 0, strategyFast},        // level  2
+		{17, 15, 16, 2, 5, 1, strategyDfast},       // level  3
+		{17, 17, 17, 2, 4, 1, strategyDfast},       // level  4
+		{17, 16, 17, 3, 4, 2, strategyGreedy},      // level  5
+		{17, 17, 17, 3, 4, 4, strategyLazy},        // level  6
+		{17, 17, 17, 3, 4, 8, strategyLazy2},       // level  7
+		{17, 17, 17, 4, 4, 8, strategyLazy2},       // level  8
+		{17, 17, 17, 5, 4, 8, strategyLazy2},       // level  9
+		{17, 17, 17, 6, 4, 8, strategyLazy2},       // level 10
+		{17, 17, 17, 5, 4, 8, strategyBtlazy2},     // level 11
+		{17, 18, 17, 7, 4, 12, strategyBtlazy2},    // level 12
+		{17, 18, 17, 3, 4, 12, strategyBtopt},      // level 13.
+		{17, 18, 17, 4, 3, 32, strategyBtopt},      // level 14.
+		{17, 18, 17, 6, 3, 256, strategyBtopt},     // level 15.
+		{17, 18, 17, 6, 3, 128, strategyBtultra},   // level 16.
+		{17, 18, 17, 8, 3, 256, strategyBtultra},   // level 17.
+		{17, 18, 17, 10, 3, 512, strategyBtultra},  // level 18.
+		{17, 18, 17, 5, 3, 256, strategyBtultra2},  // level 19.
+		{17, 18, 17, 7, 3, 512, strategyBtultra2},  // level 20.
+		{17, 18, 17, 9, 3, 512, strategyBtultra2},  // level 21.
+		{17, 18, 17, 11, 3, 999, strategyBtultra2}, // level 22.
+	},
+	{ // for srcSize <= 16 KB
+		// W,  C,  H,  S,  L,  T, strat
+		{14, 12, 13, 1, 5, 1, strategyFast},        // base for negative levels
+		{14, 14, 15, 1, 5, 0, strategyFast},        // level  1
+		{14, 14, 15, 1, 4, 0, strategyFast},        // level  2
+		{14, 14, 15, 2, 4, 1, strategyDfast},       // level  3
+		{14, 14, 14, 4, 4, 2, strategyGreedy},      // level  4
+		{14, 14, 14, 3, 4, 4, strategyLazy},        // level  5.
+		{14, 14, 14, 4, 4, 8, strategyLazy2},       // level  6
+		{14, 14, 14, 6, 4, 8, strategyLazy2},       // level  7
+		{14, 14, 14, 8, 4, 8, strategyLazy2},       // level  8.
+		{14, 15, 14, 5, 4, 8, strategyBtlazy2},     // level  9.
+		{14, 15, 14, 9, 4, 8, strategyBtlazy2},     // level 10.
+		{14, 15, 14, 3, 4, 12, strategyBtopt},      // level 11.
+		{14, 15, 14, 4, 3, 24, strategyBtopt},      // level 12.
+		{14, 15, 14, 5, 3, 32, strategyBtultra},    // level 13.
+		{14, 15, 15, 6, 3, 64, strategyBtultra},    // level 14.
+		{14, 15, 15, 7, 3, 256, strategyBtultra},   // level 15.
+		{14, 15, 15, 5, 3, 48, strategyBtultra2},   // level 16.
+		{14, 15, 15, 6, 3, 128, strategyBtultra2},  // level 17.
+		{14, 15, 15, 7, 3, 256, strategyBtultra2},  // level 18.
+		{14, 15, 15, 8, 3, 256, strategyBtultra2},  // level 19.
+		{14, 15, 15, 8, 3, 512, strategyBtultra2},  // level 20.
+		{14, 15, 15, 9, 3, 512, strategyBtultra2},  // level 21.
+		{14, 15, 15, 10, 3, 999, strategyBtultra2}, // level 22.
+	},
+}