Upgrade to Laravel 6.0.1

composer.json

@@ -5,12 +5,12 @@
     "license": "MIT",
     "type": "project",
     "require": {
-        "php": "^7.1.3",
-        "backup-manager/laravel": "^1.3",
+        "php": "^7.2",
+        "backup-manager/laravel": "dev-master",
         "barryvdh/laravel-dompdf": "^0.8.0",
-        "laracasts/flash": "~2",
+        "laracasts/flash": "^3.0",
         "fideloper/proxy": "^4.0",
-        "laravel/framework": "5.8.*",
+        "laravel/framework": "^6.0",
         "league/flysystem": "^1.0",
         "luthfi/formfield": "^1.0"
     },