Try to fix appveyor build
Try to fix appveyor build

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