Upgrade to laravel 5.8.7

composer.json

@@ -6,18 +6,19 @@
     "type": "project",
     "require": {
         "php": "^7.1.3",
-        "backup-manager/laravel": "^1.2",
+        "backup-manager/laravel": "^1.3",
         "fideloper/proxy": "^4.0",
-        "laravel/framework": "5.7.*",
+        "laravel/framework": "5.8.*",
         "laravel/tinker": "~1.0",
         "luthfi/formfield": "^1.0"
     },
     "require-dev": {
         "barryvdh/laravel-debugbar": "^3.1",
+        "filp/whoops": "^2.0",
         "fzaninotto/faker": "^1.4",
-        "laravel/browser-kit-testing": "^4.0",
+        "laravel/browser-kit-testing": "^5.0",
         "mockery/mockery": "^1.0",
-        "phpunit/phpunit": "^7.0"
+        "phpunit/phpunit": "^7.5"
     },
     "autoload": {
         "classmap": [
@@ -54,5 +55,7 @@
         "preferred-install": "dist",
         "sort-packages": true,
         "optimize-autoloader": true
-    }
+    },
+    "minimum-stability": "dev",
+    "prefer-stable": true
 }