Update arrows example so it shows more arrow types
Update arrows example so it shows more arrow types

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