chore(package): update eslint-plugin-flowtype to version 3.5.0

Closes #124

Author: greenkeeper[bot]

Diff for: package.json

@@ -101,7 +101,7 @@
     "coveralls": "^3.0.0",
     "eslint": "^4.7.2",
     "eslint-config-xo-space": "^0.17.0",
-    "eslint-plugin-flowtype": "^2.36.0",
+    "eslint-plugin-flowtype": "^3.5.0",
     "express": "^4.16.0",
     "flow-bin": "^0.58.0",
     "flow-remove-types": "^1.2.1",