Fix mypy errors on master

Newer mypy doesn't like the current code

Author: markstory

responses/__init__.py

@@ -1106,7 +1106,7 @@ def _on_request(
             response = self._real_send(adapter, request, **kwargs)  # type: ignore
         else:
             try:
-                response = adapter.build_response(  # type: ignore[no-untyped-call]
+                response = adapter.build_response(  # type: ignore[assignment]
                     request, match.get_response(request)
                 )
             except BaseException as response:

responses/matchers.py

@@ -37,7 +37,7 @@ def match(request: PreparedRequest) -> Tuple[bool, str]:
         if isinstance(request.body, bytes):
             request_body = request.body.decode("utf-8")
         else:
-            request_body = request.body
+            request_body = str(request.body)
         valid = True if request_body == params else False
         if not valid:
             reason = f"request.body doesn't match {params} doesn't match {request_body}"