garmin-express: update livecheck, add legacy version

Casks/g/garmin-express.rb

@@ -1,17 +1,37 @@
 cask "garmin-express" do
-  version "7.22.1.0,7220100"
-  sha256 :no_check
+  on_catalina :or_older do
+    version "7.18.0"
+    sha256 "f032349fa2b4cd5abe20ae9201c905874a4d3ef1b328966a29d24e6e15793729"
+
+    url "https://download.garmin.com/omt/express/GarminExpress_#{version}_OS10x.dmg"
+
+    livecheck do
+      skip "Legacy version"
+    end
+  end
+  on_big_sur :or_newer do
+    version "7.22.1"
+    sha256 :no_check
+
+    url "https://download.garmin.com/omt/express/GarminExpress.dmg"
+
+    # From https://support.garmin.com/en-US/?productID=168768&tab=software
+    livecheck do
+      url "https://support.garmin.com/capi/faq/details/?locale=en-US&faqId=9MuiEv9c2y2wgcXvzEVEe8"
+      regex(/for\s+Mac:?[\s\u00a0]*?v?(\d+(?:\.\d+)+)/i)
+      strategy :json do |json, regex|
+        match = json["content"]&.match(regex)
+        next if match.blank?
+
+        match[1]
+      end
+    end
+  end
 
-  url "https://download.garmin.com/omt/express/GarminExpress.dmg"
   name "Garmin Express"
   desc "Update maps and software, sync with Garmin Connect and register your device"
   homepage "https://www.garmin.com/en-US/software/express"
 
-  livecheck do
-    url :url
-    strategy :extract_plist
-  end
-
   auto_updates true
 
   pkg "Install Garmin Express.pkg"