vendor: update dependencies with github.com/kardianos/govendor

vendor/github.com/golang/snappy/.gitignore

@@ -1,16 +0,0 @@
-cmd/snappytool/snappytool
-testdata/bench
-
-# These explicitly listed benchmark data files are for an obsolete version of
-# snappy_test.go.
-testdata/alice29.txt
-testdata/asyoulik.txt
-testdata/fireworks.jpeg
-testdata/geo.protodata
-testdata/html
-testdata/html_x_4
-testdata/kppkn.gtb
-testdata/lcet10.txt
-testdata/paper-100k.pdf
-testdata/plrabn12.txt
-testdata/urls.10K

vendor/github.com/golang/snappy/encode.go

@@ -138,7 +138,7 @@ func NewBufferedWriter(w io.Writer) *Writer {
 	}
 }
 
-// Writer is an io.Writer than can write Snappy-compressed bytes.
+// Writer is an io.Writer that can write Snappy-compressed bytes.
 type Writer struct {
 	w   io.Writer
 	err error

vendor/github.com/golang/snappy/encode_amd64.go

@@ -26,4 +26,4 @@ func extendMatch(src []byte, i, j int) int
 // encodeBlock has the same semantics as in encode_other.go.
 //
 //go:noescape
-func encodeBlock(dst, src []byte) (d int)
+func encodeBlock(dst, src []byte) (d int)