Node migration

.github/workflows/docx-diff.yml

@@ -33,7 +33,7 @@ jobs:
       - name: Setup Node.js for baseline
         uses: actions/setup-node@v4
         with:
-          node-version: 18
+          node-version: 20
           cache: 'npm'
           cache-dependency-path: baseline/package-lock.json
 
@@ -57,7 +57,7 @@ jobs:
       - name: Setup Node.js for current
         uses: actions/setup-node@v4
         with:
-          node-version: 18
+          node-version: 20
           cache: 'npm'
           cache-dependency-path: current/package-lock.json
 

.github/workflows/npm-publish.yml

@@ -16,7 +16,7 @@ jobs:
 
       - uses: actions/setup-node@v4
         with:
-          node-version: 18
+          node-version: 20
 
       # Install dependencies with clean install (respects package-lock.json exactly)
       - run: npm ci
@@ -33,7 +33,7 @@ jobs:
 
       - uses: actions/setup-node@v4
         with:
-          node-version: 18
+          node-version: 20
           registry-url: https://registry.npmjs.org/  # Configure npm registry for publishing
 
       # Install dependencies

.github/workflows/test-pr.yml

@@ -23,7 +23,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: 18
+          node-version: 20
 
       - name: Install dependencies
         run: npm ci  # Clean install to ensure reproducible builds

.github/workflows/update-contributors.yml

@@ -21,7 +21,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: '18'
+          node-version: '20'
 
       - name: Update contributors
         id: update