Bump node-red-node-test-helper from 0.3.3 to 0.3.4

Bumps [node-red-node-test-helper](https://github.com/node-red/node-red-node-test-helper) from 0.3.3 to 0.3.4.
- [Release notes](https://github.com/node-red/node-red-node-test-helper/releases)
- [Changelog](https://github.com/node-red/node-red-node-test-helper/blob/master/CHANGELOG.md)
- [Commits](node-red/node-red-node-test-helper@0.3.3...0.3.4)

---
updated-dependencies:
- dependency-name: node-red-node-test-helper
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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