Bump pyflakes from 2.4.0 to 2.5.0

Bumps [pyflakes](https://github.com/PyCQA/pyflakes) from 2.4.0 to 2.5.0.
- [Release notes](https://github.com/PyCQA/pyflakes/releases)
- [Changelog](https://github.com/PyCQA/pyflakes/blob/master/NEWS.rst)
- [Commits](PyCQA/pyflakes@2.4.0...2.5.0)

---
updated-dependencies:
- dependency-name: pyflakes
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Pipfile

@@ -12,7 +12,7 @@ black = "*"
 coverage = "*"
 coveralls = "*"
 mypy = "*"
-pyflakes = "==2.4.0"
+pyflakes = "==2.5.0"
 pylama = {extras = ["all"], version = "*"}
 pytest = "*"