Bump parcel from 2.5.0 to 2.8.3 in /assets

Bumps [parcel](https://github.com/parcel-bundler/parcel) from 2.5.0 to 2.8.3.
- [Release notes](https://github.com/parcel-bundler/parcel/releases)
- [Changelog](https://github.com/parcel-bundler/parcel/blob/v2/CHANGELOG.md)
- [Commits](parcel-bundler/parcel@v2.5.0...v2.8.3)

---
updated-dependencies:
- dependency-name: parcel
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>