Update appveyor.yml

Author: retailcoder

appveyor.yml

@@ -164,4 +164,7 @@ notifications:
     auth_token:
       secure: CfT1+dhcyG0rXqVRUsz4C21omXk+35gLP76TpFw5NEBQdbx39tdwSGAxqGY/HZfN
     template: "{{#passed}}:white_check_mark:{{/passed}}{{#failed}}:x:{{/failed}} [Build {{&projectName}} {{buildVersion}} {{status}}]({{buildUrl}}) (commit {{commitUrl}} by @{{&commitAuthorUsername}})"
-    
+    settings: ...
+      on_build_success: true
+      on_build_failure: true
+      on_build_status_changed: true