CuracaoInvokable instantiates multiple invokables per route

[markkolich]

Doing some debugging, I realized that https://github.com/markkolich/curacao/blob/master/curacao/src/main/java/curacao/CuracaoInvokable.java#L83 news up an instance of an invokable once per route.

This is so wrong.

We need an internal cache that maps Map<Class<?>, Object> to keep track of invokables that we've already created so we don't create multiple instances wasting memory.

[markkolich]

Fixed in release 4.0.5:
https://github.com/markkolich/curacao/releases/tag/4.0.5