Drop recompose and use withFocusable alongside useFocusable hook

[marnusw]

This work builds on #79 by @GeraldHost based on my comment in #77. It seems to be an alternative to #92, with the added benefit of dropping the Recompose library and supporting ref forwarding through withFocusable provided the register callback is used in the child component. Using the register callback is, however, optional. The only requirement to make a component focusable is still to wrap it in the withFocusable HOC as before.

The individual functionalities that were implemented with Recompose have been substituted as follows:

• Config: HOC accepts config options and combines these with the props as before when passed to the hook
• getContext: useFocusable takes the parentFocusKey from the FocusContext
• withStateHandlers: In useFocusable via useState and returned state is applied as component props
• withContext: HOC uses the FocusContext provider to pass the new parent key to children
• withHandlers: useFocusable passes these directly to addFocusable now, so no need to omit from props later
• lifecycle: useFocusable implements this via useEffect
• pure: HOC uses React.memo
• omitProps: Unnecessary, interal props are removed when destructuring or in the case of handlers never placed on the props object

The useFocsable hook has not been exposed as a public API yet, but could be for use in leaf nodes if desired.

[asgvard]

Here is the new version of this library that is migrated to hooks: https://github.com/NoriginMedia/Norigin-Spatial-Navigation