fix: Fix types for appWithTranslation #1987
Merged
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This PR updates the appWithTranslation generic type to fit what is sent in by the consumers of the library.
It also updates _nextI18Next in SSRConfig to be nullable, which it may be in the case of not calling serverSideTranslations in the page.
The inverse, which is how it is today, would mean that appWithTranslation always would get a _nextI18next prop, which is not guaranteed, as indicated by the various null checks and errors thrown.
This fixes #1944
Checklist
npm run test