Errors in many streams: no attribute _http_headers

[TrishGillett]

👋 We're seeing errors like this one in many streams such as repositories, issues, pull requests, milestones, issue comments, issue events, and pull request diffs:

AttributeError: 'PullRequestsStream' object has no attribute '_http_headers'. Did you mean: 'http_headers'?

The error originates from this line in get_url_params:

self._http_headers["If-modified-since"] = email.utils.format_datetime(since)

In case it helps narrow down the issue, the labels stream seems to be unaffected for some reason.

I'm wondering if maybe it's related to a dependency version bump, what do you think @edgarrmondragon?

[edgarrmondragon]

Thanks for logging @TrishGillett! I've opened #393 to fix this going forward. I might also restore the private attribute upstream to fix the issue in existing versions of the tap.

[TrishGillett]

Thanks for fixing it so quickly! 🙏