Optional Provider

[quisido]

Should help with concurrent SSR requests.

Context needs to be backwards compatible. Add the constructor(..., context) alternative?
Make sure createContext doesn't crash if older version of React.

Maybe only provide a Provider property if the React version supports useable context in the first place.

Provide the relevant global state to the methods -- the one from the context, not the built-in instance if a context is provided.

Safe fallback if no context is provided.

Relevant docs:
https://reactjs.org/docs/legacy-context.html -
https://reactjs.org/docs/context.html#classcontexttype - 16.3+
useContext - 16.7+

[quisido]

The store provided will need to be used by getGlobal(Provider) or getGlobal(store), depending on if this should use const Provider = createProvider(); or <Provider store={createStore()}>.