Update permissions.rb with correct bitmask values and ordering; add external emoji permission
Update permissions.rb with correct bitmask values and ordering; add external emoji permission

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