Avalonia 11.0 support

[jp2masa]

I was trying to get AvaloniaEdit running on latest Avalonia nightly builds, and noticed there wasn't any support, so I made some updates to get it working, it's in this branch.

In the meanwhile I noticed there's a feature/TextFormatterPort branch, so probably my work won't be of much help anyway, just wanted to let you know.

Also, didn't check if it's fixed in the feature/TextFormatterPort branch, but there's a bug with hovering text which shows normal cursor instead of text one, but this seems to be a bug of the new Avalonia compositor, because using .With(new Win32PlatformOptions() { UseCompositor = false }) works fine.

[Gillibald]

Avalonia 0.10.999 support is available via https://github.com/AvaloniaUI/AvaloniaEdit/tree/dev

[jp2masa]

No idea how I missed that, thanks!

[KrzysztofDusko]

Is support for Avalonia 11.0.0 Preview1 planed ?

[danipen]

Already supported on master.

[Numpsy]

Would it be possible to get a new preview release of AvaloniaEdit with the Avalona 11 preview 6 changes? (i looked in the avalonia nightly feed, and didn't anything up to date in there)