Bump six from 1.15.0 to 1.16.0 (#221)

Bumps [six](https://github.com/benjaminp/six) from 1.15.0 to 1.16.0.
- [Release notes](https://github.com/benjaminp/six/releases)
- [Changelog](https://github.com/benjaminp/six/blob/master/CHANGES)
- [Commits](https://github.com/benjaminp/six/compare/1.15.0...1.16.0)

---
updated-dependencies:
- dependency-name: six
  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

@@ -23,7 +23,7 @@ python-bidi==0.4.2
 python-socks==1.1.2
 requests==2.26.0
 requests-futures==1.0.0
-six==1.15.0
+six==1.16.0
 socid-extractor>=0.0.21
 soupsieve==2.1
 stem==1.8.0