chore(package): update chai to version 3.4.0
chore(package): update chai to version 3.4.0

http://greenkeeper.io/
zemirco/node-jet,lipp/node-jet,mloy/node-jet,zemirco/node-jet,zemirco/node-jet,lipp/node-jet,mloy/node-jet,mloy/node-jet,lipp/node-jet