Bump pre-commit from 2.16.0 to 2.20.0 (#1404)

Author: dependabot[bot]

requirements/requirements_dev.txt

@@ -9,7 +9,7 @@ flake8-bugbear==21.11.29
 hypothesis==6.34.1
 invoke==1.6.0
 placebo==0.10.0
-pre-commit==2.16.0
+pre-commit==2.20.0
 pylint==2.12.2
 pytest==6.2.5
 pytest-black==0.3.12