Enabled the following mypy options: check_untyped_defs, disallow_untyped_defs, disallow_untyped_calls, disallow_incomplete_defs, disallow_untyped_decorators, disallow_untyped_decorators, strict_equality, and strict.

tox.ini

@@ -90,14 +90,19 @@ commands =
 [mypy]
 ignore_missing_imports = False
 follow_imports = normal
-; disallow_untyped_calls = True
-; disallow_untyped_defs = True
-; check_untyped_defs = True
+disallow_incomplete_defs = True
+disallow_untyped_calls = True
+disallow_untyped_decorators = True
+disallow_untyped_defs = True
+check_untyped_defs = True
 disallow_subclassing_any = True
 warn_redundant_casts = True
 warn_return_any = True
+warn_unreachable = True
 warn_unused_ignores = True
 strict_optional = True
+strict_equality = True
+strict = True
 
 [pylint]
 reports = no