Update to Laravel 5.6

Update to use with Laravel 5.3, 5.4, 5.5 and 5.6

Fix case when no data is passed

v1.3.3

Merge branch 'master' of github.com:rodrigopedra/russian-doll-caching

Fixes for Laravel 5.1 LTS

v1.3.2

Merge branch 'master' of github.com:rodrigopedra/russian-doll-caching

Added should_cache option

v1.3.1

added shlud_cache configuration option

Added support to Laravel 5.1 LTS in composer file

v1.3

refactoring and added support to Laravel 5.1 LTS on composer file

Use the + array union operator

As described in http://php.net/manual/en/function.array-merge.php

Make cache key optional

v1.2

clarify readme

Optional cache key

v1.1.0

optional key as third argument

First release

v1.0

fix service provider