more fixes for django stubs, first attempt for a plugin

django-stubs/middleware/cache.pyi

@@ -1,5 +1,6 @@
 from typing import Any, Callable, Optional, Union
 
+from django.core.cache import BaseCache
 from django.http.request import HttpRequest
 from django.http.response import HttpResponse, HttpResponseBase
 from django.utils.deprecation import MiddlewareMixin
@@ -9,32 +10,39 @@ class UpdateCacheMiddleware(MiddlewareMixin):
     cache_timeout: float = ...
     key_prefix: str = ...
     cache_alias: str = ...
-    cache: django.core.cache.backends.base.BaseCache = ...
+    cache: BaseCache = ...
     get_response: Optional[Callable] = ...
+
     def __init__(self, get_response: Optional[Callable] = ...) -> None: ...
+
     def process_response(
-        self, request: HttpRequest, response: Union[HttpResponseBase, str]
+            self, request: HttpRequest, response: Union[HttpResponseBase, str]
     ) -> Union[HttpResponseBase, str]: ...
 
+
 class FetchFromCacheMiddleware(MiddlewareMixin):
     key_prefix: str = ...
     cache_alias: str = ...
-    cache: django.core.cache.backends.base.BaseCache = ...
+    cache: BaseCache = ...
     get_response: Optional[Callable] = ...
+
     def __init__(self, get_response: Optional[Callable] = ...) -> None: ...
+
     def process_request(
-        self, request: HttpRequest
+            self, request: HttpRequest
     ) -> Optional[HttpResponse]: ...
 
+
 class CacheMiddleware(UpdateCacheMiddleware, FetchFromCacheMiddleware):
     get_response: None = ...
     key_prefix: str = ...
     cache_alias: str = ...
     cache_timeout: float = ...
-    cache: django.core.cache.backends.locmem.LocMemCache = ...
+    cache: BaseCache = ...
+
     def __init__(
-        self,
-        get_response: None = ...,
-        cache_timeout: Optional[float] = ...,
-        **kwargs: Any
+            self,
+            get_response: None = ...,
+            cache_timeout: Optional[float] = ...,
+            **kwargs: Any
     ) -> None: ...