Bump semver and expo in /webrtc-js (#366)

Bumps [semver](https://github.com/npm/node-semver) and [expo](https://github.com/expo/expo/tree/HEAD/packages/expo). These dependencies needed to be updated together.

Updates `semver` from 7.3.2 to 7.5.4
- [Release notes](https://github.com/npm/node-semver/releases)
- [Changelog](https://github.com/npm/node-semver/blob/main/CHANGELOG.md)
- [Commits](npm/node-semver@v7.3.2...v7.5.4)

Updates `expo` from 49.0.16 to 51.0.14
- [Changelog](https://github.com/expo/expo/blob/main/packages/expo/CHANGELOG.md)
- [Commits](https://github.com/expo/expo/commits/HEAD/packages/expo)

---
updated-dependencies:
- dependency-name: semver
  dependency-type: indirect
- dependency-name: expo
  dependency-type: indirect
...

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