Update CI to use Node v16.

Author: garg3133

.github/workflows/ubuntu-latest.yml

@@ -16,7 +16,7 @@ jobs:
       - name: Use Node.js
         uses: actions/setup-node@v3
         with:
-          node-version: '12.x'
+          node-version: '16.x'
       - name: Install dependencies
         run: npm install
       - run: npm run test:unit

.github/workflows/windows-latest.yml

@@ -16,7 +16,7 @@ jobs:
       - name: Use Node.js
         uses: actions/setup-node@v3
         with:
-          node-version: '12.x'
+          node-version: '16.x'
       - name: Install dependencies
         run: npm install
       - run: npm run test:unit