Update Node version in CI tests

Author: m-mohr

.github/workflows/test.yaml

@@ -3,11 +3,10 @@ on: [push, pull_request]
 jobs:
   deploy:
     runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        node-version: [14.x]
     steps:
-      - uses: actions/setup-node@v1
+      - uses: actions/setup-node@v2
+        with:
+          node-version: 'lts/*'
       - uses: actions/checkout@v2
       - run: |
           npm install