Update mypy to the latest which supports Python 3.6

setup.py

@@ -53,7 +53,10 @@ setup(
         'qa': [
             # Latest version which supports Python 3.6
             'flake8==5.0.4',
-            'mypy==0.782',
+            # Latest version which supports Python 3.6
+            'mypy==0.971',
+            # Arbitrary pins, latest at the time of pinning
+            'types-setuptools==67.2.0.1',
         ],
     },
 )