update installer script

Author: Shay Ben David

scripts/installer.js

@@ -269,6 +269,9 @@ dependencies {
     compile "com.google.firebase:firebase-database:10.2.+"
     compile "com.google.firebase:firebase-auth:10.2.+"
 
+    // for converting Java objects to JS
+    compile "com.google.code.gson:gson:2.8.+"
+    
     // for reading google-services.json and configuration
     def googlePlayServicesVersion = project.hasProperty('googlePlayServicesVersion') ? project.googlePlayServicesVersion : '10.2.+'
     compile "com.google.android.gms:play-services-base:$googlePlayServicesVersion"