build(deps): bump tweepy from 4.14.0 to 4.15.0

Bumps [tweepy](https://github.com/tweepy/tweepy) from 4.14.0 to 4.15.0.
- [Release notes](https://github.com/tweepy/tweepy/releases)
- [Changelog](https://github.com/tweepy/tweepy/blob/master/docs/changelog.md)
- [Commits](https://github.com/tweepy/tweepy/compare/v4.14.0...v4.15.0)

---
updated-dependencies:
- dependency-name: tweepy
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -106,7 +106,7 @@ six==1.17.0
 soupsieve==2.6
 testtools==2.7.2
 tlslite-ng==0.7.6
-tweepy==4.14.0
+tweepy==4.15.0
 typing-extensions==4.9.0
 typing-validation==1.2.11.post4
 ujson==5.10.0