Merge remote-tracking branch 'origin/bump-python-3.9.1' into formatting-issues

Author: bouwew

.github/workflows/verify.yml

@@ -4,7 +4,7 @@
 name: Latest commit
 
 env:
-  CACHE_VERSION: 1
+  CACHE_VERSION: 2
   DEFAULT_PYTHON: 3.9
   PRE_COMMIT_HOME: ~/.cache/pre-commit