chore(deps): update actions/setup-node action to v2 (#1763)

* chore(deps): update actions/setup-node action to v2

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.github/workflows/conformance-test.yaml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/setup-node@v1
+      - uses: actions/setup-node@v2
         with:
           node-version: 12
       - run: node --version