Exposed retain in Messaging.publish and set default to False.

Author: sky-sharma

clearblade/Messaging.py

@@ -133,6 +133,6 @@ def unsubscribe(self, channel):
         cbLogs.info("Unsubscribing from:", channel)
         self.__mqttc.unsubscribe(channel)
 
-    def publish(self, channel, message, qos=0):
+    def publish(self, channel, message, qos=0, retain=False):
         cbLogs.info("Publishing", message, "to", channel, ".")
-        self.__mqttc.publish(channel, message, qos)
+        self.__mqttc.publish(channel, message, qos, retain)