apprise: add support for macOS desktop notifications

Apprise supports desktop notifications on macOS (e.g., via `apprise -b "Hello World" "macosx://"`). This feature uses terminal-notifier under the hood. Unfortunately, the potential paths to terminal-notifier are hardcoded into apprise. Thus, nixpkgs's apprise does currently not support desktop notifications on macOS.

This PR adds the terminal-notifier dependency under macOS and patches the hardcoded paths to use nixpkgs's terminal-notifier.

pkgs/development/python-modules/apprise/default.nix

@@ -17,6 +17,8 @@
   requests,
   requests-oauthlib,
   setuptools,
+  stdenv,
+  terminal-notifier,
   testers,
 }:
 
@@ -32,6 +34,11 @@ buildPythonPackage rec {
     hash = "sha256-Qga+nLVpSj0I3Y4Dk7u5s2ISrDp3acJjNiAFXnXGyu8=";
   };
 
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
+    substituteInPlace apprise/plugins/macosx.py \
+    --replace-fail "/opt/homebrew/bin/terminal-notifier" "${lib.getExe' terminal-notifier "terminal-notifier"}"
+  '';
+
   nativeBuildInputs = [ installShellFiles ];
 
   build-system = [