[React Native] Application crashes when upgrading to 5.7.0

[beetlebum]

• Upgraded to Amplitude-js 5.7.0 from 5.6.0
• Error on startup:
  
• Error in the console:

 WARN  [AsyncStorage] The value for key "amplitude_unsent_identify_XXXXXX" is not a string. This can lead to unexpected behavior/errors. Consider stringifying it.

[vrazn]

Same problem. Had to temporary downgrade to 5.6, seems to work

[andreaspalsson]

Same problem here.

Looks like it they missed the null checks before calling AsyncStorage.setItem in _migrateUnsentEvents in this PR #204. So if AsyncStorage.getItem(this.options.unsentKey) or AsyncStorage.getItem(this.options.unsentIdentifyKey) returns null this will break.

[sputh]

Resolved in v5.7.1. I also deprecated v5.7.0 on npm