chore: pre-commit autoupdate (#39)

<!--pre-commit.ci start-->
updates:
- [github.com/pre-commit/mirrors-mypy: v1.5.1 →
v1.6.0](pre-commit/mirrors-mypy@v1.5.1...v1.6.0)
<!--pre-commit.ci end-->

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

.pre-commit-config.yaml

@@ -41,7 +41,7 @@ repos:
     args: ['--py37-plus']
 
 - repo: https://github.com/pre-commit/mirrors-mypy
-  rev: v1.5.1
+  rev: v1.6.0
   hooks:
   - id: mypy
     exclude: 'tests'