Merge pull request #252 from ezh/dependabot/pip/pre-commit-2.7.1

Bump pre-commit from 2.6.0 to 2.7.1

Author: ezh

requirements.dev.txt

@@ -1,7 +1,7 @@
 flake8==3.8.3
 invoke==1.4.1
 mkdocs==1.1.2
-pre-commit==2.6.0
+pre-commit==2.7.1
 ptpdb==0.17
 ptvsd==4.3.2
 pydoc-markdown==3.3.0