upgrade CI to node 16

Author: josepot

.github/workflows/CI.yml

@@ -15,7 +15,7 @@ jobs:
     - uses: actions/checkout@v2
     - uses: actions/setup-node@v1
       with:
-        node-version: '14'
+        node-version: '16'
     - run: npm ci
     - run: npm run lint