VS 2019 support
Took a look at making this work for VS 2019, and all I needed to have it run was to update to the latest .NET framework and update nuget packages (Not sure if all the nugets was neccecary, but did it anyways). Created a fork and a branch here: https://github.com/marza91/vimsox/tree/vs19
Now it seems to run just fine, but VS is warning that the package loads synchronously which is deprecated, so that should be fixed as well. Some instuctions for how to do that here: https://github.com/Microsoft/VSSDK-Extensibility-Samples/tree/master/AsyncPackageMigration
Will take a look at it later if I have the time, but anyone else feel the call, feel free to go ahead! Seems like the maintainer hasn't been active for a few years, so I'll see about posting a new version to the gallery as well if I feel like it gets stable enough.
Oh, and @matsande I'm not trying to hijack your project if you still want to work on/own it! Feel free to include/continue on my changes if you're still around :v:
Fixed in #6
No idea if I've done it in an optimal way, but it works for me. Created a release if anyone wants a vsix, but I won't do much more on it unless it stops working for me again: https://github.com/marza91/vimsox/releases/tag/v0.1.1