Dependencies are incorrectly resolved

[kkodev]

Consider following set of dependencies:

Cartfile: (main)
---
A ~> 1.0
B ~> 7.3
C ~> 2.9.0

Cartfile: (A)
---
C ~> 2.0

Cartfile: (B)
---
A ~> 1.0.3
C ~> 2.8.4

The result I get:

A "1.0.4" (correct)
B "7.3.0" (correct)
C "2.0.0" (wrong, should be 2.9.x)

It seems like that providing spec like "~> x.y" assumes you require "x.y.0", or "x.y.z" while it should mean "anything with major x and same or above y.z"
As a side thing, even if this assumption is made, this shouldn't even resolve properly.