upgrade laravel

Author: MatanYadaev

composer.json

@@ -25,7 +25,7 @@
     "require-dev": {
         "phpunit/phpunit": "~4.8||~5.7",
         "mockery/mockery": "^0.9.9",
-        "laravel/laravel": "^5.2",
+        "laravel/laravel": "^5.2|^6.0",
         "doctrine/dbal": "^2.5",
         "laravel/browser-kit-testing": "^2.0",
         "php-coveralls/php-coveralls": "^2.0"