fix: add missing dep flatted (#3223)

Author: aladdin-add

package.json

@@ -382,6 +382,7 @@
  "di": "^0.0.1",
  "dom-serialize": "^2.2.0",
  "expand-braces": "^0.1.1",
+ "flatted": "^2.0.0",
  "glob": "^7.1.1",
  "graceful-fs": "^4.1.2",
  "http-proxy": "^1.13.0",
@@ -415,7 +416,6 @@
  "eslint-plugin-promise": "^3.4.2",
  "eslint-plugin-react": "^7.0.1",
  "eslint-plugin-standard": "^3.0.1",
- "flatted": "^2.0.0",
  "grunt": "^1.0.0",
  "grunt-auto-release": "^0.0.7",
  "grunt-browserify": "^5.0.0",