Flutter plugin for Facebook App Events, an app measurement solution that provides insight on app usage and user engagement in Facebook Analytics. Changelog excerpt: - Add `logProductItem(...)`for product-catalog item logging, with type-safe `ProductAvailability`and `ProductCondition`enums (PR [#487](https://github.com/oddbit/flutter_facebook_app_events/pull/487)). - Add `setPushNotificationToken(String)`to register a push token for Meta push-campaign measurement. - Add `setFlushBehavior(FlushBehavior)`/ `getFlushBehavior()`to switch between automatic and explicit-only event flushing. - Add `getUserData()`, `getUserID()`, and `clearUserDataForType(FacebookUs[...]