Support Composer's ^ semver operator

[Ryan Parman]

https://getcomposer.org/doc/01-basic-usage.md#next-significant-release-tilde-and-caret-operators-

[Robert Reiz]

@skyzyx We support that operator already. Where does it not work? Can you send me a link to your project? Or the project ID? I would like to take a deeper look.

[Ryan Parman]

At the time that I filed this, VersionEye was complaining about my use of the ^ operator in my composer.json file.

As of this morning, I can no longer replicate the issue.