upgrade to Laravel 5.6

Author: kedarv

composer.json

@@ -5,25 +5,26 @@
     "license": "MIT",
     "type": "project",
     "require": {
-        "php": ">=7.0.0",
+        "php": ">=7.1.3",
         "andreasindal/laravel-markdown": "^1.1",
-        "barryvdh/laravel-debugbar": "^2.3",
         "barryvdh/laravel-dompdf": "^0.8.1",
         "brotzka/laravel-dotenv-editor": "^2.0",
         "guzzlehttp/guzzle": "^6.3",
         "intervention/image": "^2.3",
-        "laravel/framework": "5.5.*",
+        "laravel/framework": "5.6.*",
         "laravel/tinker": "~1.0",
         "maatwebsite/excel": "~2.1.0",
-        "vinkla/hashids": "^3.2",
+        "vinkla/hashids": "^4.0",
         "yajra/laravel-datatables-oracle": "8.*",
-        "zizaco/entrust": "5.2.x-dev"
+        "zizaco/entrust": "dev-master",
+        "fideloper/proxy": "~4.0"
     },
     "require-dev": {
         "filp/whoops": "~2.0",
+        "nunomaduro/collision": "~1.1",
         "fzaninotto/faker": "~1.4",
         "mockery/mockery": "~1.0",
-        "phpunit/phpunit": "~6.0",
+        "phpunit/phpunit": "~7.0",
         "symfony/thanks": "^1.0"
     },
     "autoload": {
@@ -62,5 +63,7 @@
         "preferred-install": "dist",
         "sort-packages": true,
         "optimize-autoloader": true
-    }
+    },
+    "minimum-stability": "dev",
+    "prefer-stable": true
 }