Update to archiver 0.4.2.
Update to archiver 0.4.2.

Closes gh-38.

radkodinev/grunt-contrib-compress,ctalkington/grunt-contrib-compress,philippsimon/grunt-contrib-compress,tandrewnichols/grunt-contrib-compress,gruntjs/grunt-contrib-compress,sharikovvladislav/grunt-contrib-compress,ascripcaru/grunt-contrib-compress,daemonl/grunt-contrib-compress,Drooids/grunt-contrib-compress