chore(deps): update dependency unplugin-auto-import to v20

Author: renovate[bot]

playground/package.json

@@ -21,7 +21,7 @@
     "@vitejs/plugin-vue": "^6.0.0",
     "@vue-macros/reactivity-transform": "^3.0.0-beta.3",
     "unocss": "^66.1.0-beta.3",
-    "unplugin-auto-import": "^19.1.1",
+    "unplugin-auto-import": "^20.0.0",
     "unplugin-vue-components": "^28.4.1",
     "vite": "^7.0.0",
     "vue-tsc": "^3.0.1"