On iOS, calling Notifications.getExpoPushToken() will throw an error if you don’t have permission to send notifications.On iOS, Contacts urls was renamed to urlAddresses to match Android.requestAd to requestAdAsync, showAd to showAdAsync, isReady to getIsReadyAsync. On iOS, WebBrowser.dismissBrowser() promise now resolves with to match Android.These have been replaced with static lifecycle methods: getDerivedStateFromProps and getSnapshotBeforeUpdate, but only getDerivedStateFromProps is available in 16.3.0-alpha.1.
React 16.3 deprecates the usage of componentWillMount, componentWillReceiveProps, and componentWillUpdate. The equivalent of this configuration is updates.fallbackToCacheTimeout: 0.
