examples/readme/negate in cl-1.2.2 vs examples/readme/negate in cl-1.2.3

@@ -2,9 +2,11 @@
 $: << File.expand_path('lib')
 
 require 'cl'
 
 class Add < Cl::Cmd
+  register :add
+
   opt '--notifications', 'Send out notifications to the team', negate: %w(skip)
 
   def run
     p notifications?
   end