fix: add reference to com.android.support.support-core-utils
fix: add reference to com.android.support.support-core-utils

* including only core-utils to streamline size, 1.23MB smaller than support-v4
   in demo:  v4 size:  12.10MB, core-utils size: 10.87Mb

petermetz/cordova-plugin-ibeacon,petermetz/cordova-plugin-ibeacon,petermetz/cordova-plugin-ibeacon,petermetz/cordova-plugin-ibeacon,petermetz/cordova-plugin-ibeacon