Hello,

i tried the newest version as nuget package and besides that installed neatly, when i checked in our CI build had problems because of the LICENCE.txt

I think i found the issue:
https://github.com/csoltenborn/GoogleTestAdapter/blob/master/GoogleTestAdapter/VsPackage/VsPackage.nuspec#L34
is <file src="LICENSE.txt" target="\" />
should be <file src="LICENSE.txt" target="" />

It's actually not anywhere described good, but here at least is an example without the slash :)
https://docs.microsoft.com/en-us/nuget/create-packages/creating-a-package#adding-a-readme-and-other-files

why i don't make a pull reqeust, i am lazy ;)