How to fix that warning:
Accessing view manager configs directly off UIManager via UIManager[‘getConstants’] is no longer supported. Use UIManager.getViewManagerConfig(‘getConstants’) instead.
EDIT:
1.- Reinstall react-native-gesture-handler
2.- In package.json, change "react-native-gesture-handler": "^1.3.0"
to "react-native-gesture-handler": "~1.3.0"
3.- run ‘expo start -c’