Fixes #2315

Reverts #2310

From #2310:

type declaration files are typically used during development and compilation but are not required at runtime.

This is generally true, however next-i18next actually relies on types from hoist-non-react-statics which are exposed to the user:

If types are not included when installing the library, users will experience types errors,
that might be hidden if skipLibCheck typescript compiler option is set to true (like in #2315).

If you don't want that @types package is always installed you should use peerDependencies alongside peerDependenciesMeta.
However, this will require user to manually install @types package,
so a mention to this should be added in all relevant places.

Checklist

• only relevant code is changed (make a diff before you submit the PR)
• run tests npm run test
• tests are included
• commit message and code follows the Developer's Certification of Origin