Implement handle_close
Implement handle_close

It only logs close frames to the console so far.

meew0/discordrb,Roughsketch/discordrb,VxJasonxV/discordrb,megumisonoda/discordrb,VxJasonxV/discordrb,Roughsketch/discordrb,meew0/discordrb,megumisonoda/discordrb