update

package.json

@@ -113,6 +113,7 @@
     "postcss-import": "12.0.0",
     "postcss-loader": "3.0.0",
     "postcss-url": "8.0.0",
+    "prettier": "1.13.7",
     "qrcode": "1.3.2",
     "raw-loader": "0.5.1",
     "rimraf": "2.6.2",