Test in node 0.12 as well.
Test in node 0.12 as well.

It's released now, so don't allow 0.12 failures.

wancharle/winston,psquickitjayant/winston,z-10/winston,tobli/winston,s-panferov/winston,paulhroth/winston,winstonjs/winston,modulexcite/winston,rakesh-mohanta/winston,unlucio/winston,jjmleiro/winston,winstonjs/winston,whismat/winston,dustinblackman/winston,aquavitae/winston,alinex/winston,megastef/winston,nikolas/winston,SmartNode-es/winston,harriha/winston,dbmikus/winston,DenisGorbachev/winston,beni55/winston,thaliproject/winston,get-trucked/winston