Fix alert_reason type

Author: sokratisvas

adafruit_max1704x.py

@@ -180,7 +180,7 @@ def active_alert(self) -> bool:
         return self._alert_status
 
     @property
-    def alert_reason(self) -> bool:
+    def alert_reason(self) -> int:
         """The 7 bits of alert-status that can be checked at once for flags"""
         return self._status & 0x3F