Bump pre-commit from 2.8.1 to 2.8.2 (#388)

Author: dependabot-preview[bot]

requirements-dev.txt

@@ -7,7 +7,7 @@ flake8==3.8.4
 jinja2==2.11.2
 multidict==5.0.0
 mypy==0.790; implementation_name=="cpython"
-pre-commit==2.8.1
+pre-commit==2.8.2
 pytest==6.1.2
 pytest-aiohttp==0.3.0
 pytest-cov==2.10.1