Prepare 4.0.0 release

Prepare 4.0.0-rc1

Prepare 3.1.0 release

Prepare to release 3.0.0

composer: add support for Laravel 6.0

Prepare 2.1.0 release

Prepare 2.0.1 release

Prepare the 2.0.0 release

Revert "Revert "fix docs""

This reverts commit 20b8e0c

Validate arguments before passing to authorize

Fixes rebing#407