Feat: upgrade runtime in publish pipeline to use node 20

Author: Daniel-Yonkov

.github/workflows/npm-publish-github-packages.yml

@@ -15,7 +15,7 @@ jobs:
       - uses: actions/checkout@v5
       - uses: actions/setup-node@v6
         with:
-          node-version: 18
+          node-version: 20
       - run: npm ci
       - run: npm test
 
@@ -29,7 +29,7 @@ jobs:
       - uses: actions/checkout@v5
       - uses: actions/setup-node@v6
         with:
-          node-version: 16
+          node-version: 20
           registry-url: https://npm.pkg.github.com/
           scope: 'modularity-bulgaria'
       - run: npm ci