Bump elm-test from 0.19.1-revision9 to 0.19.1-revision12

Bumps [elm-test](https://github.com/rtfeldman/node-test-runner) from 0.19.1-revision9 to 0.19.1-revision12.
- [Release notes](https://github.com/rtfeldman/node-test-runner/releases)
- [Changelog](https://github.com/rtfeldman/node-test-runner/blob/master/CHANGELOG.md)
- [Commits](rtfeldman/node-test-runner@0.19.1-revision9...0.19.1-revision12)

---
updated-dependencies:
- dependency-name: elm-test
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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