bump node version in ci to 18

Author: HLWeil

.github/workflows/build-test.yml

@@ -31,7 +31,7 @@ jobs:
     - name: Setup Node.js environment
       uses: actions/setup-node@v3
       with:
-          node-version: 16
+          node-version: 18
     - name: install node modules
       working-directory: ./
       run: npm install --ignore-scripts