Do not use the caret, because that will break older nodes

This is a change to https://github.com/mdevils/node-jscs/commit/80f036ada7dd0eb32ec08a220a5ff0a97e7df9be by @markelog. Using the caret (^) breaks older 0.10 nodes, and <= 0.8 nodes, which don't ship with a version of `npm` new enough to handle it.