Pinning regenerator to v0.4.6 because of a breaking change

The current/latest version (1.1.2) of resolver.js is broken at the moment. The regenerator library has a change in it's latest version (0.4.7) that breaks something. (see #15) I've pinned to 0.4.6 here, this will need to be merged and a new version of component-resolver should be pushed asap.