build(deps): bump xml2js, expo, expo-splash-screen and jest-expo in /app

Bumps [xml2js](https://github.com/Leonidas-from-XIV/node-xml2js) to 0.6.0 and updates ancestor dependencies [xml2js](https://github.com/Leonidas-from-XIV/node-xml2js), [expo](https://github.com/expo/expo/tree/HEAD/packages/expo), [expo-splash-screen](https://github.com/expo/expo/tree/HEAD/packages/expo-splash-screen) and [jest-expo](https://github.com/expo/expo/tree/HEAD/packages/jest-expo). These dependencies need to be updated together.


Updates `xml2js` from 0.4.23 to 0.6.0
- [Commits](https://github.com/Leonidas-from-XIV/node-xml2js/commits/0.6.0)

Updates `expo` from 48.0.19 to 49.0.21
- [Changelog](https://github.com/expo/expo/blob/main/packages/expo/CHANGELOG.md)
- [Commits](https://github.com/expo/expo/commits/HEAD/packages/expo)

Updates `expo-splash-screen` from 0.18.2 to 0.22.0
- [Changelog](https://github.com/expo/expo/blob/main/packages/expo-splash-screen/CHANGELOG.md)
- [Commits](https://github.com/expo/expo/commits/HEAD/packages/expo-splash-screen)

Updates `jest-expo` from 48.0.2 to 49.0.0
- [Changelog](https://github.com/expo/expo/blob/main/packages/jest-expo/CHANGELOG.md)
- [Commits](https://github.com/expo/expo/commits/HEAD/packages/jest-expo)

---
updated-dependencies:
- dependency-name: xml2js
  dependency-type: indirect
- dependency-name: expo
  dependency-type: direct:production
- dependency-name: expo-splash-screen
  dependency-type: direct:production
- dependency-name: jest-expo
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>