prepare for future mypy release and enable --local-partial-types now

Author: mr-c

mypy.ini

@@ -5,3 +5,4 @@ show_column_numbers = true
 show_error_codes = true
 pretty = true
 warn_unreachable = True
+local_partial_types = true

schema_salad/tests/test_cg.py

@@ -86,9 +86,6 @@ def test_import() -> None:
     } == rs.save()
 
 
-maxDiff = None
-
-
 def test_import2() -> None:
     path = get_data("tests/docimp/d1.yml")
     assert path