Merge pull request #35 from cisagov/improvement/static_type_checking

Autoupdate pre-commit hooks.  Add mypy.

.pre-commit-config.yaml

@@ -47,7 +47,7 @@ repos:
         additional_dependencies:
           - flake8-docstrings
   - repo: https://github.com/asottile/pyupgrade
-    rev: v1.26.2
+    rev: v2.0.0
     hooks:
       - id: pyupgrade
   - repo: https://github.com/PyCQA/bandit
@@ -74,7 +74,7 @@ repos:
     rev: v4.2.0
     hooks:
       - id: ansible-lint
-        # files: molecule/default/playbook.yml
+      # files: molecule/default/playbook.yml
   - repo: https://github.com/antonbabenko/pre-commit-terraform.git
     rev: v1.12.0
     hooks:
@@ -88,3 +88,7 @@ repos:
     rev: 1.19.1
     hooks:
       - id: prettier
+  - repo: https://github.com/pre-commit/mirrors-mypy
+    rev: v0.761
+    hooks:
+      - id: mypy