Taplytics 2.1.4 Release

• Fixed newAsyncVariable not returning a number variable on Android
• Fixed newAsyncVariable not returning a variable of JSON type on iOS.
• The callback function within propertiesLoadedCallback now provides a boolean type argument indicating if the properties were loaded on Android, similar to iOS
• propertiesLoadedCallback now returns a subscriber object. subscriber.remove() can be called to clean up the event listener when a component is unmounted.