Update composer.json

Update composer.json

str_contains bug fix on laravel ^6.0 (barryvdh#601)

All str_ and array_ helpers have been removed from the framework.

add support for laravel 5.8 (barryvdh#563)

Update composer.json

Support Laravel 5.6 (barryvdh#448)

Allowing Laravel 5.5 (barryvdh#373)

* Allow Laravel 5.5

* Allow Laravel 5.5

Move to 0.8

Allow L5.4

Update readme.md