Update dependency eslint-plugin-flowtype to v3.6.0

Author: renovate-bot

package.json

@@ -104,7 +104,7 @@
     "eslint-config-airbnb": "17.1.0",
     "eslint-config-prettier": "4.1.0",
     "eslint-config-react-app": "3.0.8",
-    "eslint-plugin-flowtype": "3.4.2",
+    "eslint-plugin-flowtype": "3.6.0",
     "eslint-plugin-import": "2.16.0",
     "eslint-plugin-json": "1.4.0",
     "eslint-plugin-jsx-a11y": "6.2.1",