Better semver ranges support

[mindrones]

As of version 1.0.0 it only supports ranges in the form ~1.2.3 as it seems to be the only kind of range used in d3 modules.

For example, if instead of

var MODULE_NAME = 'd3'

we use

var MODULE_NAME = 'backbone'

we get an error when processing a range like >=1.1.2 which I'm not supporting at the moment.