add middleware

Merge pull request laravel#4594 from mputkowski/patch-sftp

Add SFTP to supported storage drivers

Merge branch 'master' into develop

Merge branch 'master' of github.com:laravel/laravel

Merge pull request laravel#4493 from m1guelpf-forks/patch-1

Upgrade Vue

fixing conflicts

Merge pull request laravel#4322 from kauhat/patch-1

Ignore the Yarn error log

Merge pull request laravel#4261 from mhayes14/master

Add missing IPv4/IPv6 validation messages

Merge pull request laravel#4247 from laurencei/patch-1

Revert Queue Prefix

Merge pull request laravel#4234 from tillkruss/master

Updated changelog