Bump actions/setup-node from v1 to v2.1.2

Bumps [actions/setup-node](https://github.com/actions/setup-node) from v1 to v2.1.2.
- [Release notes](https://github.com/actions/setup-node/releases)
- [Commits](actions/setup-node@v1...c6fd00c)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/nodejs.yaml

@@ -47,7 +47,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2.3.3
       - name: Use Node.js ${{ matrix.vars.node }}
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v2.1.2
         with:
           node-version: ${{ matrix.vars.node }}
       - name: Cache PNPM store