update changelog with LABEL changes
update changelog with LABEL changes

ArvinPan/pyzmq,yyt030/pyzmq,ArvinPan/pyzmq,Mustard-Systems-Ltd/pyzmq,yyt030/pyzmq,caidongyun/pyzmq,swn1/pyzmq,dash-dash/pyzmq,ArvinPan/pyzmq,yyt030/pyzmq,dash-dash/pyzmq,Mustard-Systems-Ltd/pyzmq,dash-dash/pyzmq,caidongyun/pyzmq,Mustard-Systems-Ltd/pyzmq,swn1/pyzmq,caidongyun/pyzmq,swn1/pyzmq