Bump pyflakes from 2.3.1 to 3.0.1

Bumps [pyflakes](https://github.com/PyCQA/pyflakes) from 2.3.1 to 3.0.1.
- [Release notes](https://github.com/PyCQA/pyflakes/releases)
- [Changelog](https://github.com/PyCQA/pyflakes/blob/main/NEWS.rst)
- [Commits](PyCQA/pyflakes@2.3.1...3.0.1)

---
updated-dependencies:
- dependency-name: pyflakes
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements-tests.txt

@@ -2,4 +2,4 @@
 pytest==6.2.5
 pytest-cov==2.12.1
 flake8==3.9.2
-pyflakes==2.3.1
+pyflakes==3.0.1