chore(package): update chokidar to version 2.0.0

Author: greenkeeper[bot]

package.json

@@ -41,7 +41,7 @@
     "babel-core": "^6.24.1",
     "babel-plugin-external-helpers": "^6.22.0",
     "babel-preset-env": "^1.6.1",
-    "chokidar": "^1.6.1",
+    "chokidar": "^2.0.0",
     "eslint": "^4.1.0",
     "jquery": "^3.2.1",
     "jsdom": "^11.0.0",