fix(package): update appcenter to version 2.3.0

Closes #440

Author: greenkeeper[bot]

package.json

@@ -26,7 +26,7 @@
   "dependencies": {
     "@babel/core": "7.1.0",
     "@babel/plugin-proposal-class-properties": "7.1.0",
-    "appcenter": "1.8.1",
+    "appcenter": "2.3.0",
     "appcenter-analytics": "1.8.1",
     "appcenter-crashes": "1.8.1",
     "babel-core": "7.0.0-bridge.0",