Update the Expo SDK version and React Native version

[NathanWEdwards]

When launching the Expo app on an Android mobile device and scanning the "qa" release channel QR Code, an error message is displayed. The current version of Expo Go does not support the project's Expo SDK version.

The Expo SDK version is currently SDK 39.0.0. The latest Expo SDK version is SDK 48.0.0. Expo SDK version depends on React Native version 0.71.3, the project currently utilizes React Native version 0.64.3.

Steps to reproduce the notification error:

1. On an Android device, launch the latest version of Expo Go.
2. Scan the "qa" release channel QR Code.