Target Laravel 5.8

composer.json

@@ -5,9 +5,9 @@
     "license": "MIT",
     "type": "project",
     "require": {
-        "php": "^7.1.3",
+        "php": "^7.2",
         "fideloper/proxy": "^4.0",
-        "laravel/framework": "5.7.*",
+        "laravel/framework": "5.8.*",
         "laravel/tinker": "^1.0"
     },
     "require-dev": {