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

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