use node.js 20.18.0 (#780)

Author: joshka

.github/workflows/ci.yml

@@ -52,7 +52,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: "18"
+          node-version: "20"
 
       - name: Install node dependencies
         run: npm install

netlify.toml

@@ -13,7 +13,7 @@
 [build.environment]
   # Environment variables are set here
 
-  NODE_VERSION = "18.13.0"
+  NODE_VERSION = "20.18.0"
 
   # For apps that use next export to generate static HTML
   # set the NETLIFY_NEXT_PLUGIN_SKIP to true.