Turn RateLimiter into a module and make a `bucket` method to define buckets
Turn RateLimiter into a module and make a `bucket` method to define buckets

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