build(deps-dev): bump eslint-config-opengovsg from 2.0.6 to 3.0.0

Bumps [eslint-config-opengovsg](https://github.com/opengovsg/eslint-config-opengovsg) from 2.0.6 to 3.0.0.
- [Release notes](https://github.com/opengovsg/eslint-config-opengovsg/releases)
- [Commits](opengovsg/eslint-config-opengovsg@v2.0.6...v3.0.0)

---
updated-dependencies:
- dependency-name: eslint-config-opengovsg
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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