Fix kwarg handling for backend compat. (#22)

# Description
Fix `unit`/`units` compat. issue with API proxy service

# Issues
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# Other Notes
As noted [on
Matrix](https://matrix.to/#/!ZhEZYNzKBfpEAhtQIz:matrix.org/$FunTJOligMlv8gr_ewqKKaMOrTKje7RaK6xiFeC0cEc?via=matrix.org&via=nitro.chat&via=rx.haunted.computer)

Co-authored-by: Daniel McKnight <daniel@neon.ai>

neon_hana/mq_service_api.py

@@ -92,6 +92,9 @@ def get_session(self, node_data: NodeData) -> dict:
     def query_api_proxy(self, service_name: str, query_params: dict,
                         timeout: int = 10):
         query_params['service'] = service_name
+        if service_name in ("open_weather_map", "wolfram_alpha"):
+            query_params['units'] = query_params.pop('unit',
+                                                     query_params.get('units'))
         response = send_mq_request("/neon_api", query_params, "neon_api_input",
                                    "neon_api_output", timeout)
         return self._validate_api_proxy_response(response, query_params)