added codecov coverage report
added codecov coverage report

whittmy/tray,suzukaze/tray,qwe3243002/tray,sdjtu502/tray,passsy/tray,mistrydarshan99/tray,ravishankeraquevix/tray,grandcentrix/tray,draekko/tray,extinguish/tray,wtttc/tray,bin-liu/tray,freakynit/tray,MaTriXy/tray