use ~2.0 when depending on the CSS selector component

The API is stable and won't change.
Merge branch '2.2'

* 2.2: (30 commits)
  [HttpFoundation] Added support for partial ranges in the BinaryFileResponse.
  [HttpFoundation] Fixed byte ranges in the BinaryFileResponse.
  updated required versions when depending on the HttpFoundation component
  updated required versions when depending on the HttpKernel component
  updated required versions when depending on the Config component
  updated required versions when depending on the Form component
  updated required versions when depending on the DependencyInjection component
  updated required versions when depending on the Validator component
  updated required versions when depending on the Translation component
  updated required versions when depending on the Routing component
  updated required versions when depending on the EventDispatcher component
  updated required versions when depending on the OptionsResolver component
  updated required versions when depending on the PropertyAccess component
  updated required versions when depending on the Security component
  updated required versions when depending on the Templating component
  updated required versions when depending on the Stopwatch component
  updated required versions when depending on the Process component
  updated required versions when depending on the Finder component
  updated required versions when depending on the Dom Crawler component
  use ~2.0 when depending on the Dom Crawler component
  ...