Refactor name of injector

lib/laradi/railtie.rb

@@ -7,7 +7,7 @@ module Laradi
         config.di_config.call(container)
       end
 
-      $autoinject = Dry::AutoInject(container)
+      $laradi_injector = Dry::AutoInject(container)
     end
   end
 end