Remove node warnings from workflows

- Use setup-node to control Node version used to build
- Use Node20 compatible actions in custom actions

.github/actions/build-dist/action.yml

@@ -3,14 +3,18 @@ name: 'Build and upload distribution'
 runs:
   using: "composite"
   steps: 
+    - uses: actions/setup-node@v4
+      with:
+        node-version: 20
     - name: Build distribution
       shell: bash
       run: |
+        npm -v
+        node -v
         npm install
         npm run build
     - name: Upload distribution
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: dist
         path: dist/
-

.github/actions/download-dist/action.yml

@@ -6,7 +6,7 @@ runs:
   steps: 
     - name: Download dist
       if: ${{ env.DOWNLOAD_DIST == 'true' }}
-      uses: actions/download-artifact@v3
+      uses: actions/download-artifact@v4
       with:
         name: dist
         path: dist/

.github/workflows/ci-verify-outputs.yml

@@ -17,6 +17,9 @@ jobs:
     steps:
     - name: Checkout sources
       uses: actions/checkout@v4
+    - uses: actions/setup-node@v4
+      with:
+        node-version: 20
     - name: Build
       run: |
         npm -v