Update travis.yml Ruby version as well
Update travis.yml Ruby version as well

jhilde/studentinsights,studentinsights/studentinsights,jhilde/studentinsights,studentinsights/studentinsights,erose/studentinsights,jhilde/studentinsights,studentinsights/studentinsights,erose/studentinsights,jhilde/studentinsights,erose/studentinsights,studentinsights/studentinsights,erose/studentinsights