Update eslint-plugin-flowtype to the latest version 🚀 (parse-community#5121)

* chore(package): update eslint-plugin-flowtype to version 3.0.0

* chore(package): update lockfile package-lock.json

Author: greenkeeper[bot]

package-lock.json

@@ -56,7 +56,7 @@
     "cross-env": "5.2.0",
     "deep-diff": "1.0.2",
     "eslint": "^5.0.0",
-    "eslint-plugin-flowtype": "^2.39.1",
+    "eslint-plugin-flowtype": "^3.0.0",
     "flow-bin": "0.83.0",
     "gaze": "1.1.3",
     "husky": "^1.0.0-rc.13",