test fixture for cross-browser #922
Description
this issue is about adding a cross-browser fixture to facilitate the cross-browser testing in component like DCC or DDK.
In Dash, most of the integration tests are running against Chrome, the cross-browser fixture should be again to connect to remote selenium grid with the miminal set of tests + os combinations.
- Windows 10: Last two version of edge and the latest version of IE
- Mac OS: Safari