Upgrade chai and mocha
Upgrade chai and mocha

timmywil/jquery.panzoom,timmywil/jquery.panzoom,xiaohan2013/jquery.panzoom,timmywil/jquery.panzoom,xiaohan2013/jquery.panzoom,duchaiweb/jquery.panzoom,LuisToscano/jquery.panzoom,LuisToscano/jquery.panzoom,dherre3/jquery.panzoom,duchaiweb/jquery.panzoom,dherre3/jquery.panzoom