add sinon and sinon-chai dependencies
add sinon and sinon-chai dependencies

cycomachead/hubot-group-alias,sarboc/hubot-cute-me,viki-org/hubot-idonethis,Graion/hubot-facts,smashwilson/hubot-quotefile,hubot-scripts/hubot-cute-me,okize/hubot-chicken-dance,hbkr/hubot-twilio-call,hubot-scripts/hubot-darksky,hubot-scripts/hubot-diabetes,JonBoley/hubot-fun,okize/hubot-chicken-dance,hubot-scripts/hubot-schneier,JKirchartz/hubot-markov,victorperin/hubot-ector,yurivictor/hubot-markov,brandonjmckay/hubot-troll,okize/hubot-chicken-dance,dsgn1graphics/hubot-iheartquotes,smashwilson/hubot-hammersport,lightcap/hubot-the-more-you-know,gumroad/hubot-asana,jfhamlin/hubot-mimic,romangurovich/adoptapet,hubot-scripts/hubot-worldcup,defektive/hubot-instructure-dictionary,parmentf/hubot-ector,alchemydc/hubot-schneier,hubot-scripts/hubot-2048,JoeEnnever/hubot-tableflip,charly-palencia/hubot-nintendo,hubot-scripts/hubot-asana,hubot-scripts/hubot-group-alias-deprecated,aaccurso/hubot-facts,JoeEnnever/hubot-beer-oclock,juliangiuca/hubot-horsify,hubot-scripts/hubot-group-alias,travisvalentine/hubot-worldcup,smashwilson/hubot-markov,CaptainJiNX/hubot-mimic