[pre-commit.ci] pre-commit autoupdate

updates:
- [github.com/pre-commit/mirrors-mypy: v2.3.0 → v2.3.1](pre-commit/mirrors-mypy@v2.3.0...v2.3.1)

Author: pre-commit-ci[bot]

.pre-commit-config.yaml

@@ -36,6 +36,6 @@ repos:
     hooks:
     -   id: flake8
 -   repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v2.3.0
+    rev: v2.3.1
     hooks:
     -   id: mypy