2.1.0

Add a SystemFacade to allow clients to override Whoops behavior.
Show frame arguments in PrettyPageHandler.
Highlight the line with the error.
Add icons to search on Google and Stack Overflow.

2.0.0

Backwards compatibility breaking changes:

Run class is now final. If you inherited from Run, please now instead use a custom SystemFacade injected into the Run constructor, or contribute your changes to our core.
PHP < 5.5 support dropped.