vapor-ext is dependent on a fork of vapor and not vapor/vapor

[Adam Fowler]

Vapor-ext is dependent on the gperdomor fork of vapor. Packages that are dependent on vapor-ext are most likely going to be dependent on other packages that are dependent on the main repository of vapor. This would mean this package is being linked with two different versions of Vapor which might cause some issues.

I found this while fixing issues on my website http://swift-dependency-graph.opticalaberration.com/?package=https://github.com/vapor-community/vapor-ext