Bump send and node-red-node-test-helper

Bumps [send](https://github.com/pillarjs/send) to 0.19.0 and updates ancestor dependency [node-red-node-test-helper](https://github.com/node-red/node-red-node-test-helper). These dependencies need to be updated together.


Updates `send` from 0.18.0 to 0.19.0
- [Release notes](https://github.com/pillarjs/send/releases)
- [Changelog](https://github.com/pillarjs/send/blob/master/HISTORY.md)
- [Commits](pillarjs/send@0.18.0...0.19.0)

Updates `node-red-node-test-helper` from 0.3.2 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@0.3.2...0.3.4)

---
updated-dependencies:
- dependency-name: send
  dependency-type: indirect
- dependency-name: node-red-node-test-helper
  dependency-type: direct:development
...

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