diff --git a/vendor/golang.org/x/text/unicode/rangetable/gen.go b/vendor/golang.org/x/text/unicode/rangetable/gen.go
new file mode 100644
index 0000000..c2d3674
--- /dev/null
+++ b/vendor/golang.org/x/text/unicode/rangetable/gen.go
@@ -0,0 +1,115 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build ignore
+
+package main
+
+import (
+	"bytes"
+	"flag"
+	"fmt"
+	"io"
+	"log"
+	"reflect"
+	"strings"
+	"unicode"
+
+	"golang.org/x/text/collate"
+	"golang.org/x/text/internal/gen"
+	"golang.org/x/text/internal/ucd"
+	"golang.org/x/text/language"
+	"golang.org/x/text/unicode/rangetable"
+)
+
+var versionList = flag.String("versions", "",
+	"list of versions for which to generate RangeTables")
+
+const bootstrapMessage = `No versions specified.
+To bootstrap the code generation, run:
+	go run gen.go --versions=4.1.0,5.0.0,6.0.0,6.1.0,6.2.0,6.3.0,7.0.0
+
+and ensure that the latest versions are included by checking:
+	https://www.unicode.org/Public/`
+
+func getVersions() []string {
+	if *versionList == "" {
+		log.Fatal(bootstrapMessage)
+	}
+
+	c := collate.New(language.Und, collate.Numeric)
+	versions := strings.Split(*versionList, ",")
+	c.SortStrings(versions)
+
+	// Ensure that at least the current version is included.
+	for _, v := range versions {
+		if v == gen.UnicodeVersion() {
+			return versions
+		}
+	}
+
+	versions = append(versions, gen.UnicodeVersion())
+	c.SortStrings(versions)
+	return versions
+}
+
+func main() {
+	gen.Init()
+
+	versions := getVersions()
+
+	w := &bytes.Buffer{}
+
+	fmt.Fprintf(w, "//go:generate go run gen.go --versions=%s\n\n", strings.Join(versions, ","))
+	fmt.Fprintf(w, "import \"unicode\"\n\n")
+
+	vstr := func(s string) string { return strings.Replace(s, ".", "_", -1) }
+
+	fmt.Fprintf(w, "var assigned = map[string]*unicode.RangeTable{\n")
+	for _, v := range versions {
+		fmt.Fprintf(w, "\t%q: assigned%s,\n", v, vstr(v))
+	}
+	fmt.Fprintf(w, "}\n\n")
+
+	var size int
+	for _, v := range versions {
+		assigned := []rune{}
+
+		r := gen.Open("https://www.unicode.org/Public/", "", v+"/ucd/UnicodeData.txt")
+		ucd.Parse(r, func(p *ucd.Parser) {
+			assigned = append(assigned, p.Rune(0))
+		})
+
+		rt := rangetable.New(assigned...)
+		sz := int(reflect.TypeOf(unicode.RangeTable{}).Size())
+		sz += int(reflect.TypeOf(unicode.Range16{}).Size()) * len(rt.R16)
+		sz += int(reflect.TypeOf(unicode.Range32{}).Size()) * len(rt.R32)
+
+		fmt.Fprintf(w, "// size %d bytes (%d KiB)\n", sz, sz/1024)
+		fmt.Fprintf(w, "var assigned%s = ", vstr(v))
+		print(w, rt)
+
+		size += sz
+	}
+
+	fmt.Fprintf(w, "// Total size %d bytes (%d KiB)\n", size, size/1024)
+
+	gen.WriteVersionedGoFile("tables.go", "rangetable", w.Bytes())
+}
+
+func print(w io.Writer, rt *unicode.RangeTable) {
+	fmt.Fprintln(w, "&unicode.RangeTable{")
+	fmt.Fprintln(w, "\tR16: []unicode.Range16{")
+	for _, r := range rt.R16 {
+		fmt.Fprintf(w, "\t\t{%#04x, %#04x, %d},\n", r.Lo, r.Hi, r.Stride)
+	}
+	fmt.Fprintln(w, "\t},")
+	fmt.Fprintln(w, "\tR32: []unicode.Range32{")
+	for _, r := range rt.R32 {
+		fmt.Fprintf(w, "\t\t{%#08x, %#08x, %d},\n", r.Lo, r.Hi, r.Stride)
+	}
+	fmt.Fprintln(w, "\t},")
+	fmt.Fprintf(w, "\tLatinOffset: %d,\n", rt.LatinOffset)
+	fmt.Fprintf(w, "}\n\n")
+}