Add development dependencies.
Add development dependencies.

hronoses/vispy,kkuunnddaannkk/vispy,sbtlaarzc/vispy,QuLogic/vispy,sh4wn/vispy,ghisvail/vispy,bollu/vispy,RebeccaWPerry/vispy,jay3sh/vispy,julienr/vispy,inclement/vispy,sh4wn/vispy,michaelaye/vispy,kkuunnddaannkk/vispy,hronoses/vispy,bollu/vispy,kkuunnddaannkk/vispy,inclement/vispy,hronoses/vispy,sh4wn/vispy,sbtlaarzc/vispy,julienr/vispy,dchilds7/Deysha-Star-Formation,ghisvail/vispy,sbtlaarzc/vispy,srinathv/vispy,jay3sh/vispy,dchilds7/Deysha-Star-Formation,RebeccaWPerry/vispy,srinathv/vispy,jdreaver/vispy,michaelaye/vispy,drufat/vispy,RebeccaWPerry/vispy,ghisvail/vispy,srinathv/vispy,julienr/vispy,michaelaye/vispy,inclement/vispy,dchilds7/Deysha-Star-Formation,jay3sh/vispy,drufat/vispy,Eric89GXL/vispy,bollu/vispy,QuLogic/vispy,drufat/vispy,Eric89GXL/vispy,jdreaver/vispy,jdreaver/vispy,Eric89GXL/vispy,QuLogic/vispy