chore(deps): bump pyflakes from 2.2.0 to 2.3.0

Bumps [pyflakes](https://github.com/PyCQA/pyflakes) from 2.2.0 to 2.3.0.
- [Release notes](https://github.com/PyCQA/pyflakes/releases)
- [Changelog](https://github.com/PyCQA/pyflakes/blob/master/NEWS.rst)
- [Commits](PyCQA/pyflakes@2.2.0...2.3.0)

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

requirements.txt

@@ -8,7 +8,7 @@ autoflake==1.4
     # via autoimport (setup.py)
 click==7.1.2
     # via autoimport (setup.py)
-pyflakes==2.2.0
+pyflakes==2.3.0
     # via autoflake
 pyprojroot==0.2.0
     # via autoimport (setup.py)