Merge pull request #328 from ExaWorks/pin_flake8_version

Downgrading flake8 to 5.x since 6.x messed up and is producing F401

Author: hategan

requirements-dev.txt

@@ -7,7 +7,7 @@
 # Testing / QA
 -r requirements-tests.txt
 mypy >=0.931
-flake8
+flake8==5.0.4
 flake8-docstrings
 autopep8
 types-requests