* fixed package.json issue #353

* test travis build

* fixed package.json issue #353

* add composer install and move install commands to install step

* move php artisan migrate to script step

* move php artisan key and jwg generation to composer post installation phase

* replace create-project phases by install ones

* fix previous commit

* [fix] issue #358: sassify critical inlined style for pwa and add gulp task to handle it

* [fix] fix composer deletion issue, consider key/jwt on travis ci

* [fix] add .env copy to travis build

* [fix] revert all changes on composer.json