Bump feedparser from 6.0.10 to 6.0.11

Bumps [feedparser](https://github.com/kurtmckee/feedparser) from 6.0.10 to 6.0.11.
- [Changelog](https://github.com/kurtmckee/feedparser/blob/develop/CHANGELOG.rst)
- [Commits](kurtmckee/feedparser@6.0.10...6.0.11)

---
updated-dependencies:
- dependency-name: feedparser
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

requirements.txt

@@ -9,7 +9,7 @@ cachetools
 configparser==5.3.0
 dateparser
 emoji==1.7.0
-feedparser==6.0.10
+feedparser==6.0.11
 ffmpeg-python==0.2.0
 future==0.18.3
 git+https://github.com/python-telegram-bot/ptbcontrib.git