Upgrade nodejs to 18 (#47)

.github/workflows/build.yml

@@ -25,7 +25,7 @@ jobs:
         with:
           ref: ${{ github.event.pull_request.head.sha }}
           fetch-depth: 1
-          
+
       - name: 'Checkout submodules'
         run:
           git submodule update --init --recursive --depth 1 --jobs "$(getconf _NPROCESSORS_ONLN)";
@@ -51,7 +51,7 @@ jobs:
       - name: 'Setup node'
         uses: actions/setup-node@v3
         with:
-          node-version: '17'
+          node-version: '18'
           cache: 'npm'
           cache-dependency-path: components/svelte-portal