Add mypy.ini configuration

.circleci/config.yml

@@ -117,6 +117,6 @@ jobs:
           name: Run Mypy Static Type Checks
           command: |
               pipenv install --dev --skip-lock lxml
-              pipenv run mypy --xslt-html-report ./mypy_report ./umbral
+              pipenv run mypy --xslt-html-report ./mypy_report ./umbral --config-file=mypy.ini
       - store_artifacts:
           path: ./mypy_report

.gitignore

@@ -243,4 +243,5 @@ pip-selfcheck.json
 
 # End of https://www.gitignore.io/api/vim,linux,macos,python,pycharm,virtualenv
 
-.idea
+.idea
+/mypy_report/

mypy.ini

@@ -0,0 +1,9 @@
+[mypy]
+python_version=3.6
+verbosity=1
+[mypy-umbral.*]
+disallow_untyped_defs=True
+check_untyped_defs=False
+disallow_untyped_calls=True
+[mypy-umbral.openssl]
+disallow_untyped_defs=False