dillon1000/react

Support React.memo in ReactShallowRenderer (#14816)

* Support React.memo in ReactShallowRenderer

ReactShallowRenderer uses element.type frequently, but with React.memo
elements the actual type is element.type.type. This updates
ReactShallowRenderer so it uses the correct element type for Memo
components and also validates the inner props for the wrapped
components.

* Allow Rect.memo to prevent re-renders

* Support memo(forwardRef())

* Dont call memo comparison function on initial render

* Fix test

* Small tweaks