Tools: fix PyYAML deps for pre-commit hook
Fix 'error: Library stubs not installed for "yaml" (or incompatiblewith Python 3.9)'
@@ -97,6 +97,7 @@ repos:
- 'mypy==0.940'
- 'mypy-extensions==0.4.3'
- 'types-setuptools==57.4.14'
+ - 'types-PyYAML==0.1.9'
language: python
types: [python]
- id: check-copyright
