Use node 20 in GH workflows.

Author: fmassot

.github/workflows/ci.yml

@@ -18,7 +18,7 @@ jobs:
       - name: Setup Node.js environment
         uses: actions/setup-node@v3
         with:
-          node-version: '16'
+          node-version: '20'
           cache: 'npm'
 
       - name: Install dependencies

.github/workflows/release.yml

@@ -15,7 +15,7 @@ jobs:
       - name: Setup Node.js environment
         uses: actions/setup-node@v3
         with:
-          node-version: '16'
+          node-version: '20'
           cache: 'npm'
 
       - name: Setup Go environment