chore: add mypy pre-commit hook

Brooke-white · Brooke-white · commit a86c7e9a4761 · 2021-01-25T09:11:49.000-08:00
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
@@ -14,3 +14,8 @@ repos:
     rev: stable
     hooks:
       - id: black
+  - repo: https://github.com/pre-commit/mirrors-mypy
+    rev: v0.790
+    hooks:
+      - id: mypy
+        verbose: true
