run black over stubs, add checking to travis

django-stubs-generated/db/migrations/state.pyi

@@ -7,7 +7,6 @@ from django.db.models.fields import Field
 from django.db.models.indexes import Index
 from django.db.models.manager import Manager
 
-
 class AppConfigStub:
     apps: None
     label: str
@@ -41,9 +40,7 @@ class ModelState:
     def clone(self) -> ModelState: ...
     def construct_managers(self) -> Iterator[Tuple[str, Manager]]: ...
     @classmethod
-    def from_model(
-        cls, model: Type[Model], exclude_rels: bool = ...
-    ) -> ModelState: ...
+    def from_model(cls, model: Type[Model], exclude_rels: bool = ...) -> ModelState: ...
     def get_field_by_name(self, name: str) -> Field: ...
     @cached_property
     def name_lower(self) -> str: ...
@@ -54,9 +51,7 @@ class ProjectState:
     models: Dict[Any, Any]
     real_apps: List[str]
     def __init__(
-        self,
-        models: Optional[Dict[Tuple[str, str], ModelState]] = ...,
-        real_apps: Optional[List[str]] = ...,
+        self, models: Optional[Dict[Tuple[str, str], ModelState]] = ..., real_apps: Optional[List[str]] = ...
     ) -> None: ...
     def add_model(self, model_state: ModelState) -> None: ...
     @cached_property
@@ -67,9 +62,7 @@ class ProjectState:
     def concrete_apps(self) -> StateApps: ...
     @classmethod
     def from_apps(cls, apps: Apps) -> ProjectState: ...
-    def reload_model(
-        self, app_label: str, model_name: str, delay: bool = ...
-    ) -> None: ...
+    def reload_model(self, app_label: str, model_name: str, delay: bool = ...) -> None: ...
     def reload_models(self, models: List[Any], delay: bool = ...) -> None: ...
     def remove_model(self, app_label: str, model_name: str) -> None: ...
 
@@ -82,12 +75,7 @@ class StateApps:
     ready: bool
     real_models: List[django.db.migrations.state.ModelState]
     stored_app_configs: List[Any]
-    def __init__(
-        self,
-        real_apps: List[str],
-        models: Dict[Tuple[str, str], ModelState],
-        ignore_swappable: bool = ...,
-    ) -> None: ...
+    def __init__(self, real_apps: List[str], models: Dict[Tuple[str, str], ModelState], ignore_swappable: bool = ...) -> None: ...
     def bulk_update(self) -> Iterator[None]: ...
     def clone(self) -> StateApps: ...
     def render_multiple(self, model_states: List[ModelState]) -> None: ...