github: change node version

Author: panoel

.github/workflows/test.yaml

@@ -8,7 +8,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
-          node-version: 16
+          node-version: 20
           cache: 'npm'
           cache-dependency-path: package-lock.json
       - run: npm ci
@@ -26,7 +26,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
-          node-version: 16
+          node-version: 20
       - run: npm ci
       - run: npx prettier --check .
   build-fly: