Release 5.1.3

[emawby]

🎉 New Methods

See the migration guide for details on these new getters and the User observer

• Add OneSignalId and ExternalId getters as well as a user changed observer (Add OneSignalId and ExternalId getters as well as a user changed observer #98)

🔧 Native SDK Updates

Update Android SDK from 5.1.8 to 5.1.10

• Fix for WorkManager not initialized crash (Fix for WorkManager not Initialized Crash  OneSignal-Android-SDK#2052)
• Various network call optimizations
• For full changes, see the native release notes

Update iOS SDK from 5.1.4 to 5.1.6

• Fix crashes when encoding user models (Fix crashes when encoding user models OneSignal-iOS-SDK#1412)
• Add back the dropshadow on In-App Messages and include a plist option to disable it ([User Model] Add back the dropshadow to In App Messages with a plist option to disable it OneSignal-iOS-SDK#1395)
• For full changes, see the native release notes