chore(package): update watchify to version 3.6.1
chore(package): update watchify to version 3.6.1

http://greenkeeper.io/
watson-developer-cloud/speech-to-text-nodejs,leonrch/speech-to-text-nodejs,olegka311/FirstKnApp,olegka311/KnFirstapp,nothinkelse/sentiment-of-things,kasaby/speech-to-text-nodejs,nothinkelse/sentiment-of-things,nothinkelse/sentiment-of-things,watson-developer-cloud/speech-to-text-nodejs