Add pagination to comment lookup query

[desrosj]

What?

This adds pagination the the queries attempting to locate a previous comment from the bot to update.

Why?

The maximum number of items that can be returned by GitHub APIs is 100. When pull requests have a long history before receiving a comment from the bot, the bot will be unable to locate a previous comment and will continuously add new ones.

This fixes #54.

[github-actions]

The following accounts have interacted with this PR and/or linked issues. I will continue to update these lists as activity occurs. You can also manually ask me to refresh this list by adding the props-bot label.

Core SVN

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Props: desrosj, jorbin, andrewserong.

GitHub Merge commits

If you're merging code through a pull request on GitHub, copy and paste the following into the bottom of the merge commit message.

Co-authored-by: desrosj <[email protected]>
Co-authored-by: aaronjorbin <[email protected]>
Co-authored-by: andrewserong <[email protected]>

To understand the WordPress project's expectations around crediting contributors, please review the Contributor Attribution page in the Core Handbook.

[andrewserong]

Wonderful, thanks for fixing this up (and relatedly for the Co-authored-by note / props — lovely to see that you're using the bot within this repo, too! 😀)