Fix vercel deployment, non-react codemirror demo

Author: yoen-velt

apps/javascript/crdt/text-editors/codemirror/codemirror-crdt-demo/vite.config.js

@@ -6,6 +6,11 @@ export default defineConfig({
     alias: {
       '@': path.resolve(__dirname, './src'),
     },
+    dedupe: [
+      '@codemirror/state',
+      '@codemirror/view',
+      '@codemirror/language',
+    ],
   },
   server: {
     port: 3000,