run black over stubs, add checking to travis

django-stubs-generated/core/checks/registry.pyi

@@ -3,7 +3,6 @@ from typing import Any, Callable, List, Optional, Set, Union
 from django.apps.config import AppConfig
 from django.core.checks.messages import CheckMessage
 
-
 class Tags:
     admin: str = ...
     caches: str = ...
@@ -19,25 +18,13 @@ class CheckRegistry:
     registered_checks: Set[Callable] = ...
     deployment_checks: Set[Callable] = ...
     def __init__(self) -> None: ...
-    def register(
-        self,
-        check: Optional[Union[Callable, str]] = ...,
-        *tags: Any,
-        **kwargs: Any
-    ) -> Callable: ...
+    def register(self, check: Optional[Union[Callable, str]] = ..., *tags: Any, **kwargs: Any) -> Callable: ...
     def run_checks(
-        self,
-        app_configs: Optional[List[AppConfig]] = ...,
-        tags: Optional[List[str]] = ...,
-        include_deployment_checks: bool = ...,
+        self, app_configs: Optional[List[AppConfig]] = ..., tags: Optional[List[str]] = ..., include_deployment_checks: bool = ...
     ) -> Union[List[CheckMessage], List[int], List[str]]: ...
-    def tag_exists(
-        self, tag: str, include_deployment_checks: bool = ...
-    ) -> bool: ...
+    def tag_exists(self, tag: str, include_deployment_checks: bool = ...) -> bool: ...
     def tags_available(self, deployment_checks: bool = ...) -> Set[str]: ...
-    def get_checks(
-        self, include_deployment_checks: bool = ...
-    ) -> List[Callable]: ...
+    def get_checks(self, include_deployment_checks: bool = ...) -> List[Callable]: ...
 
 registry: Any
 register: Any