Bump six from 1.15.0 to 1.16.0

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](benjaminp/six@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>

Author: dependabot[bot]

requirements.txt

@@ -7,11 +7,11 @@ idna==2.10
 jwt==1.2.0
 numpy==1.20.1
 pandas==1.2.3
-pycparser==2.20
+pycparser==2.21
 python-dateutil==2.8.1
 pytz==2021.1
 requests==2.25.1
-six==1.15.0
+six==1.16.0
 urllib3==1.26.3
 websockets==8.1
 zope.interface==5.2.0