Bump flake8-comprehensions from 3.3.0 to 3.3.1

Bumps [flake8-comprehensions](https://github.com/adamchainz/flake8-comprehensions) from 3.3.0 to 3.3.1.
- [Release notes](https://github.com/adamchainz/flake8-comprehensions/releases)
- [Changelog](https://github.com/adamchainz/flake8-comprehensions/blob/master/HISTORY.rst)
- [Commits](https://github.com/adamchainz/flake8-comprehensions/compare/3.3.0...3.3.1)

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

requirements-dev.txt

@@ -2,7 +2,7 @@
 flake8==3.8.4
 flake8-annotations-coverage==0.0.4
 flake8-cognitive-complexity==0.1.0
-flake8-comprehensions==3.3.0
+flake8-comprehensions==3.3.1
 flake8-docstrings==1.5.0
 isort==5.6.4
 flake8-isort==4.0.0