message: Touch runtime's README as well (for lerna)
diff: End-users will usually not add this package directly as a dependency themselves, and would instead receive it as a dependency of their chosen integration (e.g. `@stylable/webpack-plugin`).
  ## Usage
  +
  `@stylable/runtime` exposes two methods, `Stylesheet` and `Renderer`.
  ### Stylesheet
  +
  The stylesheet function is returned when importing a Stylable stylesheet. It is used for creating the DOM-attributes required for CSS to be applied.
  ```ts
  @@ -54,6 +56,7 @@ style.root;
  ```
  ### Renderer
  +
  Responsible for managing CSS files, linking to the `document` and maintaining their correct order in your application.
  ## License
  