Add typescript tests for v10 hooks (like we had in v9)

[jamuhl]

Get back the test coverage for the upcoming v10 (currently (soon) it is published as npm i react-i18next@next)

[jamuhl]

@rosskevin would be awesome if we could add that coverage back in v10 - a lot changed with using hooks but basic type definitions should already be there

[rosskevin]

@jamuhl it looks like you dropped NamespaceConsumer from v10 but the hoc is retained. That's too hard of a break in my opinion for class-based users. I for one am exclusively using it over the hoc, and we have many classes to convert before we can use hooks.

If leaving this as-is I would have two choices:

1. convert my entire class code to functions and hooks (not incremental)
2. convert my entire function code to hooks AND convert all NamespaceConsumer usage to hocs or functions and hooks.

I suggest strongly that the NamespaceConsumer render callback needs to be included in v10 (perhaps deprecated).

[rosskevin]

@jamuhl would you have any objections to converting the spec.js to spec.tsx typescript? This would inherently provide basic coverage for the type definitions.

[jamuhl]

@rosskevin ...would prefer keeping stuff separated...

hm...might add a render prop like the HOC using the hook internally

[rosskevin]

hm...might add a render prop like the HOC using the hook internally

That would definitely be advisable, it would be mostly a search/replace instead of a major upgrade crisis where everyone is forced to roll their own.