fix: add types to fix deprecation warning

[dnicolson]

What did you implement:

This pull request adds types to command line options.

Closes #568

How can we verify it:

Run serverless info and check for deprecation warnings.

Todos:

Note: Run npm run test:ci to run all validation checks on proposed changes

• [x] Ensure there are no lint errors.
  Validate via npm run lint
  Note: Some reported issues can be automatically fixed by running npm run lint:fix
• [x] Write tests and confirm existing functionality is not broken.
  Validate via npm test
• [ ] Write documentation
• [ ] Provide verification config / commands / resources
• [x] Enable "Allow edits from maintainers" for this PR
• [x] Update the messages below

Is this ready for review?: YES Is it a breaking change?: NO

[pgrzesik]

Thank you @dnicolson - it looks good, however, the branch is not up-to-date with `master. Could you please update it so it's either rebased on top of current master or has current master merged into it?

[dnicolson]

Hi @pgrzesik, I updated master a while back but a few days ago https://github.com/serverless/serverless-azure-functions/pull/577 was merged so it needs updating again. The fork has since been deleted, is someone able to merge master into this pull request?

[pgrzesik]

Hello @dnicolson 👋 @tbarlow12 would you be able to help out with that?

[akurtz]

Bumping this