zstd: 1.4.5 -> 1.4.8

+ https://github.com/facebook/zstd/releases/tag/v1.4.7
+ https://github.com/facebook/zstd/releases/tag/v1.4.8

pkgs/tools/compression/zstd/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, fetchpatch, cmake, bash, gnugrep
+{ stdenv, fetchFromGitHub, cmake, bash, gnugrep
 , fixDarwinDylibNames
 , file
 , legacySupport ? false
@@ -7,13 +7,13 @@
 
 stdenv.mkDerivation rec {
   pname = "zstd";
-  version = "1.4.5";
+  version = "1.4.8";
 
   src = fetchFromGitHub {
     owner = "facebook";
     repo = "zstd";
     rev = "v${version}";
-    sha256 = "0ay3qlk4sffnmcl3b34q4zd7mkcmjds023icmib1mdli97qcp38l";
+    sha256 = "018zgigp5xlrb4mgshgrvns0cfbhhcg89cifbjj4rv6s3n9riphw";
   };
 
   nativeBuildInputs = [ cmake ]
@@ -22,10 +22,6 @@ stdenv.mkDerivation rec {
 
   patches = [
     ./playtests-darwin.patch
-    (fetchpatch {
-      url = "https://github.com/facebook/zstd/pull/2163.patch";
-      sha256 = "07mfjc5f9wy0w2xlj36hyf7g5ax9r2rf6ixhkffhnwc6rwy0q54p";
-    })
   ] # This I didn't upstream because if you use posix threads with MinGW it will
     # work fine, and I'm not sure how to write the condition.
     ++ stdenv.lib.optional stdenv.hostPlatform.isWindows ./mcfgthreads-no-pthread.patch;
@@ -88,6 +84,7 @@ stdenv.mkDerivation rec {
       property shared by most LZ compression algorithms, such as zlib.
     '';
     homepage = "https://facebook.github.io/zstd/";
+    changelog = "https://github.com/facebook/zstd/blob/v${version}/CHANGELOG";
     license = with licenses; [ bsd3 ]; # Or, at your opinion, GPL-2.0-only.
 
     platforms = platforms.all;