add changelog.md
add changelog.md

nitinhayaran/CZPicker,backupparachute/CZPicker,hejunbinlan/CZPicker,hejunbinlan/CZPicker,hoanganh6491/CZPicker,hejunbinlan/CZPicker,chenzeyu/CZPicker,backupparachute/CZPicker,backupparachute/CZPicker,nitinhayaran/CZPicker,puvanarajan/CZPicker,LaserPatrick/CZPicker,chenzeyu/CZPicker,iMokhles/CZPicker,hoanganh6491/CZPicker,puvanarajan/CZPicker,puvanarajan/CZPicker,LaserPatrick/CZPicker,nitinhayaran/CZPicker,iMokhles/CZPicker,hoanganh6491/CZPicker,iMokhles/CZPicker,LaserPatrick/CZPicker,chenzeyu/CZPicker