update gemspec
update gemspec

1234-/fakefs,bf4/fakefs,defunkt/fakefs,dekz/fakefs,deployable/fakefs,moretea/fakefs,eventualbuddha/fakefs,fakefs/fakefs,openSUSE/fakefs,zimbatm/fakefs,anthonyryan1/fakefs,bquorning/fakefs,lgierth/fakefs,marxarelli/fakefs,onehub/fakefs,pivotal-cf-experimental/fakefs,vhl/fakefs