Make a Server.leave method, fixes #54
Make a Server.leave method, fixes #54

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