ci: use node 16

Author: bweigel

.github/workflows/ci.yml

@@ -19,10 +19,10 @@ jobs:
         working-directory: continous-integration
     steps:
     - uses: actions/checkout@v2
-    - name: Use Node.js 12.x
+    - name: Use Node.js 16.x
       uses: actions/setup-node@v1
       with:
-        node-version: 12.x
+        node-version: 16.x
     - name: Install AWS SAM CLI
       run:  pip install aws-sam-cli
     - name: NPM CI