[pre-commit.ci] pre-commit autoupdate (#846)

updates:
- [github.com/pre-commit/mirrors-mypy: v0.990 → v0.991](pre-commit/mirrors-mypy@v0.990...v0.991)

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

@@ -39,7 +39,7 @@ repos:
         language: python
         additional_dependencies: [pygments, restructuredtext_lint]
 -   repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v0.990
+    rev: v0.991
     hooks:
     -   id: mypy
         files: ^(src/|testing/)