Update pre-commit hook versions

Author: brandonwillard

.pre-commit-config.yaml

@@ -25,7 +25,7 @@ repos:
     hooks:
       - id: isort
   - repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v1.2.0
+    rev: v1.4.1
     hooks:
       - id: mypy
         args: [--ignore-missing-imports]