chore(bridge): add missing defu dependency

Author: pi0

package.json

@@ -17,6 +17,7 @@
     "@nuxt/postcss8": "^1.1.3",
     "@vue/composition-api": "^1.2.2",
     "acorn": "^8.5.0",
+    "defu": "^5.0.0",
     "enhanced-resolve": "^5.8.3",
     "estree-walker": "^2.0.2",
     "fs-extra": "^10.0.0",