Bump actions/setup-node from 2.3.1 to 2.4.0 (#175)

Bumps [actions/setup-node](https://github.com/actions/setup-node) from 2.3.1 to 2.4.0.
- [Release notes](https://github.com/actions/setup-node/releases)
- [Commits](actions/setup-node@v2.3.1...v2.4.0)

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

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -23,7 +23,7 @@ jobs:
       - uses: actions/[email protected]
 
       - name: Use Node.js
-        uses: actions/setup-node@v2.3.1
+        uses: actions/setup-node@v2.4.0
         with:
           node-version: ${{ matrix.node-version }}