message: docs: add note about peerDependencies
  closes
diff: @@ -135,6 +135,10 @@ For npm:
  ## Usage as a React component
  +Install peer dependencies required by ReDoc if you don't have them installed already:
  +
  + npm i react react-dom mobx@^4.2.0 styled-components
  +
  Import `RedocStandalone` component from 'redoc' module:
  ```js
  