Allow passing request_timeout to client_fetch (#67)

* Allow passing request_timeout to client_fetch

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: afbarbaro

pytest_jupyter/jupyter_server.py

@@ -315,8 +315,12 @@ def client_fetch(*parts, headers=None, params=None, **kwargs):
         # Add auth keys to header, if not overridden
         for key, value in jp_auth_header.items():
             headers.setdefault(key, value)
+        # Handle timeout
+        request_timeout = kwargs.pop("request_timeout", 20)
         # Make request.
-        return http_server_client.fetch(url, headers=headers, request_timeout=20, **kwargs)
+        return http_server_client.fetch(
+            url, headers=headers, request_timeout=request_timeout, **kwargs
+        )
 
     return client_fetch