Update actions/setup-node action to v2 (#69)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

Author: renovate[bot]

.github/workflows/test.yml

@@ -18,7 +18,7 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Use Node ${{ matrix.node }}
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v2
         with:
           node-version: ${{ matrix.node }}