Bump emoji from 2.7.0 to 2.8.0

Bumps [emoji](https://github.com/carpedm20/emoji) from 2.7.0 to 2.8.0.
- [Release notes](https://github.com/carpedm20/emoji/releases)
- [Changelog](https://github.com/carpedm20/emoji/blob/master/CHANGES.md)
- [Commits](carpedm20/emoji@v2.7.0...v2.8.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -2,7 +2,7 @@ apispec==6.3.0
 bunch==1.0.1
 dicttoxml==1.7.16
 dpath==2.1.6
-emoji==2.7.0
+emoji==2.8.0
 falcon-apispec==0.4.0
 falcon-auth==1.1.0
 falcon-elastic-apm==0.1.1