Correct order of parameters for Cursor's init (#301)

* Correct order of parameters for Cursor's init

Fix for issue #300

* Update api.py

pydruid/db/api.py

@@ -204,8 +204,8 @@ def __init__(
         context=None,
         header=False,
         ssl_verify_cert=True,
-        proxies=None,
         ssl_client_cert=None,
+        proxies=None,
     ):
         self.url = url
         self.context = context or {}