chore(deps): bump tracery-grammar from 2.7.4 to 2.8.4

Bumps [tracery-grammar](https://github.com/v21/tracery) from 2.7.4 to 2.8.4.
- [Commits](https://github.com/v21/tracery/commits)

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

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