chore(package): update estraverse to version 5.0.0

Author: greenkeeper[bot]

package.json

@@ -41,7 +41,7 @@
     "eslint-config-airbnb-base": "^14.0.0",
     "eslint-plugin-flowtype": "^4.5.2",
     "eslint-plugin-import": "^2.18.0",
-    "estraverse": "^4.2.0",
+    "estraverse": "^5.0.0",
     "expect": "^24.3.1",
     "flow-bin": "^0.112.0",
     "in-publish": "^2.0.0",