Adding minitest development req for ruby 2.2
Adding minitest development req for ruby 2.2

jdycar/deployinator,etsy/deployinator,jdycar/deployinator,cyberrodent/deployinator,etsy/deployinator,rvml/deployinator,friedenberg/deployinator,mpgarate/deployinator,friedenberg/deployinator,nkammah/deployinator,mpgarate/deployinator,rvml/deployinator,nkammah/deployinator,jdycar/deployinator,nkammah/deployinator,cyberrodent/deployinator,friedenberg/deployinator,etsy/deployinator,cyberrodent/deployinator,mpgarate/deployinator,rvml/deployinator