Have PSModule resolve without Find-Module if version is explicity listed - Performance Improvement

[JustinGrote]

Say I have a PSDepend that is:
@{
BuildHelpers = '1.1.4'
}

And I already have buildhelpers 1.1.4 installed. PSDepend should not do a find-module but accept that it is there. This would massively speed up dependency checking when a lot of modules are involved, since PSdepend doesn't run in parallel. If 'latest' is specified it will always find-module regardless.

I'll write a PR if you agree. I can write is as a parameter -FastVersionMatch or something.

[gaelcolas]

PR #96 should have you covered. It would be great if you could give it a spin