refactor(card-io): allow number as type for guideColor (#2815)
refactor(card-io): allow number as type for guideColor (#2815)

* Change guide color to string|number type 

When the platform is Android, the cordova plugin wait for an Int value to set the guide color.

* Update index.ts

driftyco/ionic-native,driftyco/ionic-native,driftyco/ionic-native