Bump rsvp from 4.7.0 to 4.8.5

Bumps [rsvp](https://github.com/tildeio/rsvp.js) from 4.7.0 to 4.8.5.
- [Changelog](https://github.com/tildeio/rsvp.js/blob/master/CHANGELOG.md)
- [Commits](tildeio/rsvp.js@v4.7.0...v4.8.5)

---
updated-dependencies:
- dependency-name: rsvp
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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