* Ensure when module Contracts is included, Builtin module is also included

! NO TESTING

Author: PikachuEXE

lib/contracts.rb

@@ -14,6 +14,7 @@
 module Contracts
   def self.included(base)
     base.send(:include, Core)
+    base.send(:include, Builtin)
   end
 
   def self.extended(base)