Update metaclass 0.0.2 -> 0.0.4
Update metaclass 0.0.2 -> 0.0.4

This is a dependency of the mocha gem.

Change-Id: I31a82c827700938aed1aaeb8f718abc28aab3b17

kalw/diffux,diffux/diffux,diffux/diffux,diffux/diffux,kalw/diffux,kalw/diffux