[pre-commit.ci] pre-commit autoupdate (#661)

updates:
- [github.com/pre-commit/mirrors-mypy: v0.971 → v0.981](pre-commit/mirrors-mypy@v0.971...v0.981)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: pre-commit-ci[bot]

.pre-commit-config.yaml

@@ -60,7 +60,7 @@ repos:
           - --py37-plus
 
   - repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v0.971
+    rev: v0.981
     hooks:
       - id: mypy
         pass_filenames: false