Update GH action

Author: djhi

.github/workflows/test.yml

@@ -15,7 +15,7 @@ jobs:
     - name: Use Node.js LTS
       uses: actions/setup-node@v1
       with:
-        node-version: '14.x'
+        node-version: '20.x'
     - uses: bahmutov/npm-install@v1
       with:
         install-command: yarn --immutable