update contributing and packages, add parallel testing command

CONTRIBUTING.md

@@ -7,7 +7,7 @@ We accept contributions via Pull Requests on [Github](https://github.com/joselfo
 
 ## Pull Requests
 
-- **[PSR-2 Coding Standard](https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-2-coding-style-guide.md)** - Check the code style with ``$ composer check-style`` and fix it with ``$ composer fix-style``.
+- **[PSR-2 Coding Standard](https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-2-coding-style-guide.md)** - Check and fix the code standard with ``$ composer cs``.
 
 - **Add tests!** - Your patch won't be accepted if it doesn't have tests.
 
@@ -25,7 +25,7 @@ We accept contributions via Pull Requests on [Github](https://github.com/joselfo
 ## Running Tests
 
 ``` bash
-$ vendor/bin/phpunit
+$ composer test
 ```
 
 

composer.json

@@ -33,6 +33,7 @@
         "spatie/laravel-permission": "^3.17"
     },
     "require-dev": {
+        "brianium/paratest": "^6.2",
         "eduarguz/shift-php-cs": "dev-master",
         "facade/ignition": "^2.5",
         "fakerphp/faker": "^1.9.1",
@@ -81,6 +82,9 @@
         ],
         "cs": [
             "vendor/bin/php-cs-fixer fix --config=.php_cs.dist -vvv --using-cache=no"
+        ],
+        "test": [
+            "php artisan test --parallel"
         ]
     }
 }