Support stateless functional components as a route action

[kuy]

The route definition accepts only Component or PureComponent because it uses isReactComponent to determine components or generators.

[rpunkfu]

Is there any way to do so, expect checking if passed value is a function? I couldn't find any official method for it :)

[kuy]

Yes, so I need to call a function and check a return value. If a function is a stateless functional component, it may return ReactElement. If not so, it's a saga. Anyway, we can execute it using call effect.

[kuy]

I have to prepare automated test for first release.

[rpunkfu]

Yup, tests would be cool, if you manage to choose & setup tools for testing, I would be happy to help in writing them :)

[kuy]

I noticed that I can also use is-generator module to determine the value is a generator function or a normal function. typeof value.prototype.isReactComponent === 'undefined' && !isGeneratorFunction(value) is a stateless functional component.