Bump flat and codeceptjs in /codeceptjs-example

Bumps [flat](https://github.com/hughsk/flat) to 5.0.2 and updates ancestor dependency [codeceptjs](https://github.com/Codeception/codeceptjs). These dependencies need to be updated together.


Updates `flat` from 4.1.1 to 5.0.2
- [Commits](hughsk/flat@4.1.1...5.0.2)

Updates `codeceptjs` from 3.1.3 to 3.4.1
- [Changelog](https://github.com/codeceptjs/CodeceptJS/blob/3.x/CHANGELOG.md)
- [Commits](codeceptjs/CodeceptJS@3.1.3...3.4.1)

---
updated-dependencies:
- dependency-name: flat
  dependency-type: indirect
- dependency-name: codeceptjs
  dependency-type: direct:development
...

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