Update manifest.json

bump version to 0.3.1

Author: rlippmann

custom_components/adtpulse/manifest.json

@@ -10,5 +10,5 @@
     "requirements": [
         "pyadtpulse>=1.1.2"
     ],
-    "version": "0.3.0"
+    "version": "0.3.1"
 }