Bump fast-json-patch and web-ext

Bumps [fast-json-patch](https://github.com/Starcounter-Jack/JSON-Patch) to 3.1.1 and updates ancestor dependency [web-ext](https://github.com/mozilla/web-ext). These dependencies need to be updated together.


Updates `fast-json-patch` from 2.2.1 to 3.1.1
- [Release notes](https://github.com/Starcounter-Jack/JSON-Patch/releases)
- [Commits](Starcounter-Jack/JSON-Patch@v2.2.1...3.1.1)

Updates `web-ext` from 7.3.1 to 7.8.0
- [Release notes](https://github.com/mozilla/web-ext/releases)
- [Commits](mozilla/web-ext@7.3.1...7.8.0)

---
updated-dependencies:
- dependency-name: fast-json-patch
  dependency-type: indirect
- dependency-name: web-ext
  dependency-type: direct:development
...

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