build(deps-dev): bump start-server-and-test in /token-swap/js

Bumps [start-server-and-test](https://github.com/bahmutov/start-server-and-test) from 1.14.0 to 2.0.12.
- [Release notes](https://github.com/bahmutov/start-server-and-test/releases)
- [Commits](bahmutov/start-server-and-test@v1.14.0...v2.0.12)

---
updated-dependencies:
- dependency-name: start-server-and-test
  dependency-version: 2.0.12
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]