upgrade github.com/klauspost/compress to v1.13.4

This includes the following zstd improvements since v1.13.3:

* Fix incorrect encoding in best mode
  klauspost/compress#415

Author: mostynb

go.mod

@@ -2,4 +2,4 @@ module github.com/mostynb/zstdpool-syncpool
 
 go 1.15
 
-require github.com/klauspost/compress v1.13.3
+require github.com/klauspost/compress v1.13.4

go.sum

@@ -1,4 +1,4 @@
 github.com/golang/snappy v0.0.3 h1:fHPg5GQYlCeLIPB9BZqMVR5nR9A+IM5zcgeTdjMYmLA=
 github.com/golang/snappy v0.0.3/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
-github.com/klauspost/compress v1.13.3 h1:BtAvtV1+h0YwSVwWoYXMREPpYu9VzTJ9QDI1TEg/iQQ=
-github.com/klauspost/compress v1.13.3/go.mod h1:8dP1Hq4DHOhN9w426knH3Rhby4rFm6D8eO+e+Dq5Gzg=
+github.com/klauspost/compress v1.13.4 h1:0zhec2I8zGnjWcKyLl6i3gPqKANCCn5e9xmviEEeX6s=
+github.com/klauspost/compress v1.13.4/go.mod h1:8dP1Hq4DHOhN9w426knH3Rhby4rFm6D8eO+e+Dq5Gzg=