Add missing `MacOS.release` deprecation.

Library/Homebrew/compat.rb

@@ -8,3 +8,4 @@ require "compat/ENV/shared"
 require "compat/extend/string"
 require "compat/gpg"
 require "compat/dependable"
+require "compat/os/mac"

Library/Homebrew/compat/os/mac.rb

+module OS
+  module Mac
+    class << self
+      def release
+        odeprecated "MacOS.release", "MacOS.version"
+        version
+      end
+    end
+  end
+end