chore(build): bump build env to node 20.x

Author: Gerald Baulig

.github/workflows/build.yaml

@@ -12,7 +12,7 @@ jobs:
       - name: Setup NodeJS
         uses: actions/setup-node@v1
         with:
-          node-version: '12.18'
+          node-version: '20.8.0'
 
       - name: Install Dependencies
         run: npm ci
@@ -30,7 +30,7 @@ jobs:
       - name: Setup NodeJS
         uses: actions/setup-node@v1
         with:
-          node-version: '12.18'
+          node-version: '20.8.0'
 
       - name: Setup System
         uses: restorecommerce/setup-system-action@v1