There currently is an alpha release of 2.0. There are a few major points on the list we are thinking about including in 2.0 because 2.0 already contains a lot of breaking changes and those things would cause breaking changes, too. Unfortunately this is a question of having the time to make those missing changes before 2.0 gets released "officially".
All in all I'd say the current master branch is as stable as any release we could put out today would be. It's just the question whether you would be alright with having to adjust your code again to any further breaking changes after the "official release".
All in all I'd say the current master branch is as stable as any release we could put out today would be. It's just the question whether you would be alright with having to adjust your code again to any further breaking changes after the "official release".