Fix root value and context getter types (#3712)

RELEASE.md

@@ -0,0 +1,5 @@
+Release type: minor
+
+In this release, the return types of the `get_root_value` and `get_context`
+methods were updated to be consistent across all view integrations. Before this
+release, the return types used by the ASGI and Django views were too generic.

strawberry/asgi/__init__.py

@@ -5,7 +5,6 @@
 from json import JSONDecodeError
 from typing import (
     TYPE_CHECKING,
-    Any,
     AsyncGenerator,
     AsyncIterator,
     Callable,
@@ -185,7 +184,9 @@ async def __call__(self, scope: Scope, receive: Receive, send: Send) -> None:
         else:  # pragma: no cover
             raise ValueError("Unknown scope type: {!r}".format(scope["type"]))
 
-    async def get_root_value(self, request: Union[Request, WebSocket]) -> Optional[Any]:
+    async def get_root_value(
+        self, request: Union[Request, WebSocket]
+    ) -> Optional[RootValue]:
         return None
 
     async def get_context(

strawberry/django/views.py

@@ -221,8 +221,8 @@ class GraphQLView(
     def get_root_value(self, request: HttpRequest) -> Optional[RootValue]:
         return None
 
-    def get_context(self, request: HttpRequest, response: HttpResponse) -> Any:
-        return StrawberryDjangoContext(request=request, response=response)
+    def get_context(self, request: HttpRequest, response: HttpResponse) -> Context:
+        return StrawberryDjangoContext(request=request, response=response)  # type: ignore
 
     def get_sub_response(self, request: HttpRequest) -> TemporalHttpResponse:
         return TemporalHttpResponse()
@@ -276,11 +276,13 @@ def as_view(cls, **initkwargs: Any) -> Callable[..., HttpResponse]:
 
         return view
 
-    async def get_root_value(self, request: HttpRequest) -> Any:
+    async def get_root_value(self, request: HttpRequest) -> Optional[RootValue]:
         return None
 
-    async def get_context(self, request: HttpRequest, response: HttpResponse) -> Any:
-        return StrawberryDjangoContext(request=request, response=response)
+    async def get_context(
+        self, request: HttpRequest, response: HttpResponse
+    ) -> Context:
+        return StrawberryDjangoContext(request=request, response=response)  # type: ignore
 
     async def get_sub_response(self, request: HttpRequest) -> TemporalHttpResponse:
         return TemporalHttpResponse()