gogui: 1.5.4a -> 1.6.0 (#389326)

pkgs/by-name/go/gogui/package.nix

···
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "gogui";
-  version = "1.5.4a";
+  version = "1.6.0";
 
   src = fetchFromGitHub {
     owner = "Remi-Coulom";
     repo = "gogui";
     rev = "v${finalAttrs.version}";
-    hash = "sha256-UFhOk2mAnTtxfwEOHquN64YDCRq7nNUqZAPQf77MEEw=";
+    hash = "sha256-pJGZpSFdOvMkeetdX3+wB+8sk3LO6znJ0dUNvjOmiB8=";
   };
 
   nativeBuildInputs = [