Initialize parameters to empti dict in send method (#19)

Until now this parameter could be believed as not required but it is in the code.

Signed-off-by: Patrick ZAJDA <[email protected]>

pysmsboxnet/api.py

@@ -55,7 +55,7 @@ async def __smsbox_request(self, uri: str, parameters: dict) -> str:
                 f"reached while sending the SMS"
             ) from exception
 
-    async def send(self, dest: str, msg: str, mode: str, parameters: dict) -> int:
+    async def send(self, dest: str, msg: str, mode: str, parameters: dict = []) -> int:
         """Send a SMS."""
         postData = {
             "dest": dest,