Add SimpleX 5.3.1 cask

Casks/s/simplex.rb

@@ -0,0 +1,27 @@
+cask "simplex" do
+  arch arm: "aarch64", intel: "x86_64"
+
+  version "5.3.1"
+  sha256 arm:   "cfdaf17794b8b794b919e22edb2b6e0f6f9d1ead153592d937a98c92f476c617",
+         intel: "24d4acac948fa333de3385e59e8930e76df55fae55e31e6f1ab4037a4e68bac6"
+
+  url "https://github.com/simplex-chat/simplex-chat/releases/download/v#{version}/simplex-desktop-macos-#{arch}.dmg",
+      verified: "github.com/simplex-chat/simplex-chat/"
+  name "SimpleX Chat"
+  desc "Messenger for SimpleX protocol"
+  homepage "https://simplex.chat/"
+
+  livecheck do
+    # To not grab f-droid and pre-releases
+    strategy :github_latest do |json, regex|
+      match = json["tag_name"]&.match(regex)
+      next if match.blank?
+
+      match[1]
+    end
+  end
+
+  app "SimpleX.app"
+
+  zap trash: "~/Library/Saved Application State/chat.simplex.app.savedState"
+end