[pre-commit.ci] pre-commit autoupdate

updates:
- [github.com/pre-commit/mirrors-mypy: v0.942 → v0.950](pre-commit/mirrors-mypy@v0.942...v0.950)

Author: pre-commit-ci[bot]

.pre-commit-config.yaml

@@ -23,7 +23,7 @@ repos:
   - id: isort
 
 - repo: https://github.com/pre-commit/mirrors-mypy
-  rev: v0.942
+  rev: v0.950
   hooks:
   - id: mypy
     files: src