We are unable to see any problem using Feather 1.4.400.0 with Sitefinity 8.2.5905 (or any of the other internal builds of Sitefinity 8.2).
Please do elaborate further about the problem. What seems to be incompatible?
For example you are unable to build the project or it is not able to initialize?
Can you please also provide more information about any other nuget packages you have installed in your project.
Also please note that if you have MVC widget in external assemblies the Feather version must be the same across all project so you also need to update the Telerik.Sitefinity.Feather.Core package in the external assemblies.
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