Require same PHP version as framework

composer.json

@@ -5,7 +5,7 @@
     "license": "MIT",
     "type": "project",
     "require": {
-        "php": ">=7.1.0",
+        "php": ">=7.1.3",
         "fideloper/proxy": "~4.0",
         "laravel/framework": "5.6.*",
         "laravel/tinker": "~1.0"