Rework CONTRIBUTING.md [ci skip]
Rework CONTRIBUTING.md [ci skip]

webdev1001/byebug,ozydingo/byebug,yui-knk/byebug,scalp42/byebug,deivid-rodriguez/byebug,yui-knk/byebug,guilherme/byebug,guilherme/byebug,yui-knk/byebug,icebreaker/byebug,deivid-rodriguez/byebug,k0kubun/byebug,webdev1001/byebug,saisai/byebug,saisai/byebug,os97673/byebug,icebreaker/byebug,ozydingo/byebug,miamiruby/byebug,deivid-rodriguez/byebug,guilherme/byebug,miamiruby/byebug,k0kubun/byebug,k0kubun/byebug,os97673/byebug,scalp42/byebug