Merge pull request #85 from arduino/dependabot/pip/flake8-4.0.1

Bump flake8 from 3.9.2 to 4.0.1

Author: per1234

poetry.lock

@@ -13,7 +13,7 @@ python = "^3.9"
 [tool.poetry.dev-dependencies]
 black = "^21.9b0"
 codespell = "^2.1.0"
-flake8 = "^3.9.2"
+flake8 = "^4.0.1"
 invoke = "^1.6.0"
 pep8-naming = "^0.12.1"
 pytest = "^6.2.5"