You are still redistributing source code that is derivative of transporter's code (like goja_builder.go and other stuff). Not to mention that anyone can just roll back commits in your repository and get to the original code of transporter, with original license, copyright and even authors list.

I think that's a license violation, because you are not keeping an original copyright notice in repositor. If you think otherwise - whatever. I don't want to argue on technicalities.

I think I'll just forward info to transporter's developers, so that they can handle the situation the way they want. You can argue with them or maybe they just don't care.