v11.0.0

• Add PHP7 type-hints #557
• Move to Astrotomic #1 & #4

migrate from dimsav to astrotomic

1. upgrade to dimsav/laravel-translatable:v10.0.0
2. run composer remove dimsav/laravel-translatable
3. run composer require astrotomic/laravel-translatable
4. replace Dimsav\ by Astrotomic\ in your whole project (namespace change)