Merge pull request #89 from garrettheath4/issue-88

Patch: Fixed param type in MQTT.add_topic_callback(..) method docstring

Author: brentru

adafruit_minimqtt/adafruit_minimqtt.py

@@ -364,7 +364,7 @@ def add_topic_callback(self, mqtt_topic, callback_method):
         """Registers a callback_method for a specific MQTT topic.
 
         :param str mqtt_topic: MQTT topic identifier.
-        :param str callback_method: Name of callback method.
+        :param function callback_method: Name of callback method.
         """
         if mqtt_topic is None or callback_method is None:
             raise ValueError("MQTT topic and callback method must both be defined.")