Should the types be moved to dev dependencies?

[giraffesyo]

If the package is used in a javascript project, a warning is thrown:

warning " > @vercel/fetch@6.1.0" has unmet peer dependency "@types/node-fetch@2".

If this was moved to dev dependencies, it would stop that error from showing up I believe. Also, we could probably move @types/async-retry down to dev dependencies too while we're at it.

Would there be any problems I'm not foreseeing if I made this change?

[Ethan-Arrowood]

Thank you for the report. We are archiving this project; you can read more details here: #83