Bump actions/setup-node from v1 to v2.1.1

Bumps [actions/setup-node](https://github.com/actions/setup-node) from v1 to v2.1.1.
- [Release notes](https://github.com/actions/setup-node/releases)
- [Commits](actions/setup-node@v1...321b6cc)

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

Author: dependabot[bot]

.github/workflows/build.yml

@@ -17,7 +17,7 @@ jobs:
         id: configs
         run: echo "##[set-output name=NODE_VERSION;]$(cat .nvmrc)"
       - name: Setup node
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v2.1.1
         with:
           node-version: ${{ steps.configs.outputs.NODE_VERSION }}
           registry-url: 'https://registry.npmjs.org'