Merge pull request #95 from python-hyper/pre-commit-ci-update-config

[pre-commit.ci] pre-commit autoupdate

Author: sigmavirus24

.pre-commit-config.yaml

@@ -22,7 +22,7 @@ repos:
     -   id: pyupgrade
         args: [--py36-plus]
 -   repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v0.971
+    rev: v0.981
     hooks:
     -   id: mypy
         exclude: ^(docs/|tests/)