Fix error in mypy 0.920

Author: i80and

pyproject.toml

@@ -27,7 +27,7 @@ requires = [
 dev = [
     "black ~= 21.12b0",
     "pyflakes ~= 2.4",
-    "mypy ~= 0.910",
+    "mypy ~= 0.920",
     "pyinstaller ~= 4.7",
     "isort ~= 5.10.1",
     "types-requests ~= 2.26.1",

snooty/flutter.py

@@ -80,7 +80,7 @@ def make_factory(value: object) -> Callable[[], Any]:
             # in the lambda is a ~~hack~~ to avoid messing up the variable binding.
             fields: Dict[str, _Field] = {
                 field.name: _Field(
-                    field.default_factory  # type: ignore
+                    field.default_factory
                     if field.default_factory is not MISSING  # type: ignore
                     else (
                         (make_factory(field.default))