update gemspec with better gem deps
update gemspec with better gem deps

davoclavo/faraday,ru-faraon/Faraday-is-an-HTTP-client,petems/faraday,prcongithub/faraday,mauricionr/faraday,santiagodoldan/faraday,iamjarvo/faraday,travis-repos/faraday,whomwah/faraday,jrafanie/faraday,hrysd/faraday,ngpestelos/faraday,apepper/faraday,O-I/faraday,zhaoxl/faraday,mehulkar/faraday,prcongithub/faraday,jrafanie/faraday,avdi/faraday,stayhero/faraday,grosser/faraday,lostisland/faraday,iamjarvo/faraday,pcarrier-packaging/deb-ruby-faraday,ekampp/faraday,stayhero/faraday,hrysd/faraday,customink/faraday,zanker/faraday,davoclavo/faraday,lgierth/faraday,luvtechno/faraday,grosser/faraday,flower-pot/faraday,jhass/faraday,davidcornu/faraday,pvdb/faraday,AvaelKross/faraday,mehulkar/faraday,daviswahl/faraday,jhass/faraday,engineyard/faraday,flower-pot/faraday,AvaelKross/faraday,apepper/faraday,santiagodoldan/faraday,nevans/faraday,nevans/faraday,zanker/faraday,hstrowd/faraday,customink/faraday,coinbase/faraday,daviswahl/faraday,coinbase/faraday,davidcornu/faraday,mauricionr/faraday,ekampp/faraday,spyofchina/faraday,petems/faraday,lostisland/faraday,ru-faraon/Faraday-is-an-HTTP-client,O-I/faraday,luvtechno/faraday,engineyard/faraday,spyofchina/faraday,ngpestelos/faraday,fbjork/faraday,pvdb/faraday,zhaoxl/faraday,pcarrier-packaging/deb-ruby-faraday,hstrowd/faraday