run black over stubs, add checking to travis

django-stubs-generated/contrib/sites/apps.pyi

@@ -4,7 +4,6 @@ from django.apps import AppConfig
 
 from .management import create_default_site
 
-
 class SitesConfig(AppConfig):
     apps: None
     label: str

django-stubs-generated/contrib/sites/management.pyi

@@ -3,12 +3,6 @@ from typing import Any, Optional
 from django.apps.registry import Apps
 from django.contrib.sites.apps import SitesConfig
 
-
 def create_default_site(
-    app_config: SitesConfig,
-    verbosity: int = ...,
-    interactive: bool = ...,
-    using: str = ...,
-    apps: Apps = ...,
-    **kwargs: Any
+    app_config: SitesConfig, verbosity: int = ..., interactive: bool = ..., using: str = ..., apps: Apps = ..., **kwargs: Any
 ) -> None: ...

django-stubs-generated/contrib/sites/managers.pyi

@@ -4,7 +4,6 @@ from django.core.checks.messages import Error
 from django.db import models
 from django.db.models.query import QuerySet
 
-
 class CurrentSiteManager(models.Manager):
     creation_counter: int
     model: None

django-stubs-generated/contrib/sites/middleware.pyi

@@ -5,7 +5,6 @@ from django.utils.deprecation import MiddlewareMixin
 
 from .shortcuts import get_current_site
 
-
 class CurrentSiteMiddleware(MiddlewareMixin):
     get_response: None
     def process_request(self, request: HttpRequest) -> None: ...

django-stubs-generated/contrib/sites/requests.pyi

@@ -2,12 +2,9 @@ from typing import Any, Optional
 
 from django.http.request import HttpRequest
 
-
 class RequestSite:
     name: str
     domain: str = ...
     def __init__(self, request: HttpRequest) -> None: ...
-    def save(
-        self, force_insert: bool = ..., force_update: bool = ...
-    ) -> Any: ...
+    def save(self, force_insert: bool = ..., force_update: bool = ...) -> Any: ...
     def delete(self) -> Any: ...

django-stubs-generated/contrib/sites/shortcuts.pyi

@@ -4,7 +4,4 @@ from django.contrib.sites.models import Site
 from django.contrib.sites.requests import RequestSite
 from django.http.request import HttpRequest
 
-
-def get_current_site(
-    request: Optional[HttpRequest]
-) -> Union[Site, RequestSite]: ...
+def get_current_site(request: Optional[HttpRequest]) -> Union[Site, RequestSite]: ...