mixin.rb in isomorfeus-react-16.8.0

- old
+ new

@@ -7,9 +7,10 @@
         base.extend(::React::Component::NativeComponentValidateProp)
         base.extend(::React::Component::ShouldComponentUpdate)
         base.extend(::React::Component::EventHandler)
         base.include(::React::Component::Elements)
         base.include(::React::Component::API)
+        base.include(::React::Component::Callbacks)
         base.include(::React::Component::UnsafeAPI)
         base.include(::React::Component::Initializer)
         base.include(::React::Component::Features)
         base.include(::React::Component::Resolution)
       end