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

Author: greenkeeper[bot]

package.json

@@ -32,7 +32,7 @@
     "conventional-changelog-express": "^2.0.0",
     "conventional-changelog-jshint": "^2.0.0",
     "escape-string-regexp": "^2.0.0",
-    "fs-extra": "^8.0.1",
+    "fs-extra": "^9.0.0",
     "nyc": "^15.0.0",
     "proxyquire": "^2.1.0",
     "semantic-release": "^17.0.0",