Bump attrs from 21.2.0 to 21.3.0 (#281)

Bumps [attrs](https://github.com/python-attrs/attrs) from 21.2.0 to 21.3.0.
- [Release notes](https://github.com/python-attrs/attrs/releases)
- [Changelog](https://github.com/python-attrs/attrs/blob/main/CHANGELOG.rst)
- [Commits](https://github.com/python-attrs/attrs/compare/21.2.0...21.3.0)

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

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -3,7 +3,7 @@ aiohttp==3.8.1
 aiohttp-socks==0.7.1
 arabic-reshaper==2.1.3
 async-timeout==4.0.2
-attrs==21.2.0
+attrs==21.3.0
 certifi==2021.10.8
 chardet==4.0.0
 colorama==0.4.4