Install rake global on travis
Install rake global on travis

rossta/webpacker,usertesting/webpacker,gauravtiwari/webpacker,rossta/webpacker,rossta/webpacker,Davidzhu001/webpacker,usertesting/webpacker,Davidzhu001/webpacker,rails/webpacker,rails/webpacker,usertesting/webpacker,gauravtiwari/webpacker,rossta/webpacker,gauravtiwari/webpacker,Davidzhu001/webpacker