alacritty: 0.3.3 -> 0.4.0

Also:
- remove postPatch (config is not generated anymore;
  i.e. there's no `mouse.rs` or `xdg-open` mentions anywhere

pkgs/applications/misc/alacritty/default.nix

@@ -52,16 +52,16 @@ let
   ];
 in buildRustPackage rec {
   pname = "alacritty";
-  version = "0.3.3";
+  version = "0.4.0";
 
   src = fetchFromGitHub {
     owner = "jwilm";
     repo = pname;
     rev = "v${version}";
-    sha256 = "1h9zid7bi19qga3a8a2d4x3ma9wf1njmj74s4xnw7nzqqf3dh750";
+    sha256 = "0adaqdbma6gskb2g14yscrgr9gch5wf2g2clchplv72c2qr1k427";
   };
 
-  cargoSha256 = "1rxb5ljgvn881jkxm8772kf815mmp08ci7sqmn2x1jwdcrphhxr1";
+  cargoSha256 = "1r267g8f986nxh8ms5yhp50qy1yl8gly2jr78p738qqc6frlxlhv";
 
   nativeBuildInputs = [
     cmake
@@ -76,10 +76,6 @@ in buildRustPackage rec {
     ++ lib.optionals stdenv.isDarwin [ AppKit CoreGraphics CoreServices CoreText Foundation OpenGL ];
 
   outputs = [ "out" "terminfo" ];
-  postPatch = ''
-    substituteInPlace alacritty_terminal/src/config/mouse.rs \
-      --replace xdg-open ${xdg_utils}/bin/xdg-open
-  '';
 
   postBuild = lib.optionalString stdenv.isDarwin "make app";