Bump actions/setup-node from 2.3.0 to 2.4.0

Bumps [actions/setup-node](https://github.com/actions/setup-node) from 2.3.0 to 2.4.0.
- [Release notes](https://github.com/actions/setup-node/releases)
- [Commits](https://github.com/actions/setup-node/compare/v2.3.0...v2.4.0)

---
updated-dependencies:
- dependency-name: actions/setup-node
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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