update README: add users of zaver
update README: add users of zaver

niuzhenlin/zaver,neverdend/zaver,our880tom/zaver,sayounara/zaver,sayounara/zaver,our880tom/zaver,zyearn/zaver,neverdend/zaver,niuzhenlin/zaver,zyearn/zaver,zyearn/zaver