Add kwargs support to matrix params creation

Support for additional keyword arguments added to matrix params creation by updating with kwargs.

Author: tobwen

routingpy/routers/valhalla.py

@@ -643,6 +643,8 @@ def get_matrix_params(
         if id:
             params["id"] = id
 
+        params.update(kwargs)
+
         return params
 
     @staticmethod