fix build error

Author: corneliusyaovi

package.json

@@ -34,9 +34,7 @@
     "build": "cross-env NODE_ENV=production rollup --config build/rollup.config.js",
     "build:ssr": "cross-env NODE_ENV=production rollup --config build/rollup.config.js --format cjs",
     "build:es": "cross-env NODE_ENV=production rollup --config build/rollup.config.js --format es",
-    "build:unpkg": "cross-env NODE_ENV=production rollup --config build/rollup.config.js --format iife",
-
-
+    "build:unpkg": "cross-env NODE_ENV=production rollup --config build/rollup.config.js --format iife"
   },
   "dependencies": {},
   "devDependencies": {