fix(create-vite): update template-lit-ts tsconfig (fix #12854) (#12855)

Author: augustjk

packages/create-vite/template-lit-ts/tsconfig.json

@@ -1,7 +1,8 @@
 {
   "compilerOptions": {
     "target": "ES2020",
-    "useDefineForClassFields": true,
+    "experimentalDecorators": true,
+    "useDefineForClassFields": false,
     "module": "ESNext",
     "lib": ["ES2020", "DOM", "DOM.Iterable"],
     "skipLibCheck": true,