Upgrade Nodejs runtime from 12 to 16 (#170)

This updates the NodeJS runtime version from 12 to 16. NodeJS 12 is EOL on 4/30/2022. NodeJS 16 is supported on all Github Actions Runners v2.285.0 or later.

Signed-off-by: Rui Chen <rui@chenrui.dev>
Co-authored-by: James Pogran <jpogran@outlook.com>

.github/workflows/continuous-integration.yml

@@ -15,17 +15,16 @@ jobs:
         os: [ubuntu-latest, windows-latest, macos-latest]
 
     steps:
-    - name: Checkout
-      uses: actions/checkout@v2
+    - uses: actions/checkout@v3
 
-    - name: Setup Node.js 12.x
-      uses: actions/setup-node@v1
+    - name: Setup Node.js 16.x
+      uses: actions/setup-node@v3
       with:
-        node-version: '12.x'
+        node-version: '16.x'
 
     - name: Install
       run: npm clean-install
-    
+
     - name: Verify
       if: runner.os == 'Linux'
       run: |