use node v14 in release job

Author: rmorshea

Diff for: .github/workflows/release-pkg.yml

@@ -14,6 +14,8 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v2-beta
+        with:
+          node-version: "14"
       - name: Set up Python
         uses: actions/setup-python@v1
         with: