[docs] API docs missing information since flow 0.53.x upgrade

### Problem description
update/fix react-docgen after https://github.com/reactjs/react-docgen/issues/207

### Steps to reproduce
`yarn docs:api`

Temp debug script is `./docs/scripts/buildApiES5.js`


