Restore the force_close method to the ResponseHandler

fixes aio-libs/aiodocker#920

Author: bdraco

aiohttp/client_proto.py

@@ -64,6 +64,9 @@ def should_close(self) -> bool:
             or self._tail
         )
 
+    def force_close(self) -> None:
+        self._should_close = True
+
     def close(self) -> None:
         transport = self.transport
         if transport is not None: