fix(package): update fs-extra to version 9.0.0

Closes #15

Author: greenkeeper[bot]

package.json

@@ -49,7 +49,7 @@
   "homepage": "https://github.com/asmagin/rainbow-js-codegeneration#readme",
   "dependencies": {
     "array-sort": "^1.0.0",
-    "fs-extra": "^7.0.1",
+    "fs-extra": "^9.0.0",
     "glob": "^7.1.2",
     "gulp-util": "^3.0.8",
     "handlebars": "^4.0.11",