Bump sentry-sdk from 0.14.4 to 0.15.0 (#347)

Bumps [sentry-sdk](https://github.com/getsentry/sentry-python) from 0.14.4 to 0.15.0.
- [Release notes](https://github.com/getsentry/sentry-python/releases)
- [Changelog](https://github.com/getsentry/sentry-python/blob/master/CHANGES.md)
- [Commits](getsentry/sentry-python@0.14.4...0.15.0)

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Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Author: dependabot-preview[bot]

requirements.txt

@@ -4,4 +4,4 @@ gidgethub==4.1.0
 cachetools==4.1.0
 redis==3.5.3
 celery==4.4.2
-sentry-sdk==0.14.4
+sentry-sdk==0.15.0