fix(deps): update dependency eslint-plugin-flowtype to v2.50.0

Author: renovate-bot

packages/react-scripts/package.json

@@ -39,7 +39,7 @@
     "eslint": "4.10.0",
     "eslint-config-react-app": "^2.0.1",
     "eslint-loader": "1.9.0",
-    "eslint-plugin-flowtype": "2.39.1",
+    "eslint-plugin-flowtype": "2.50.0",
     "eslint-plugin-import": "2.8.0",
     "eslint-plugin-jsx-a11y": "5.1.1",
     "eslint-plugin-react": "7.4.0",