fix: done callback execution when each method limit reached

[Hunga1]

Fixes #678

For resources that contain an each method to stream records from the API until a limit is reached, its opts.done callback fails to execute when the user defines a limit in the opts object and it is reached.

Changes include new tests for testing that:

• The opts.done callback is executed when incomingPhoneNumber records processed
• The opts.done callback is executed when a user defined limit is reached for incomingPhoneNumber records

Checklist

• I acknowledge that all my contributions will be made under the project's license
• I have made a material change to the repo (functionality, testing, spelling, grammar)
• I have read the Contribution Guidelines and my PR follows them
• I have titled the PR appropriately
• I have updated my branch with the main branch
• I have added tests that prove my fix is effective or that my feature works
• I have added the necessary documentation about the functionality in the appropriate .md file
• I have added inline documentation to the code I modified

If you have questions, please file a support ticket, or create a GitHub Issue in this repository.

[Hunga1]

I've went ahead and made the changes to address the requests. PR is ready for another look.

[Hunga1]

PR is ready for another review.

[childish-sambino]

LGTM

nit: recommend against force-pushing once a PR has been open. It makes it difficult to track what's changed since the last review.