ByRole: current, expanded, and description filters not working

[lsoares]

It looks like current, expanded, and description don't work as stated in the docs. It's like the filters aren't working at all. I put the examples at the Testing Playground to test them but they don't filter as they should.

• current: Docs | Playground
• expanded: Docs | Playground
• description: Docs | Playground

I think it's because the Testing Playground (and the Chrome extension) don't use the latest version of the Dom TL (I checked the code and it doesn't reference those properties yet).