chore(deps): bump com.github.retrooper:packetevents-spigot (#111)

Bumps [com.github.retrooper:packetevents-spigot](https://github.com/retrooper/packetevents) from 2.7.0 to 2.8.0.
- [Release notes](https://github.com/retrooper/packetevents/releases)
- [Commits](retrooper/packetevents@v2.7.0...v2.8.0)

---
updated-dependencies:
- dependency-name: com.github.retrooper:packetevents-spigot
  dependency-version: 2.8.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]