[pre-commit.ci] pre-commit autoupdate (#48)

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

@@ -55,7 +55,7 @@ repos:
         stages: [manual]
 
   - repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v0.971
+    rev: v0.981
     hooks:
       - id: mypy
         exclude: jupyter_client/tests