Drop support for PHP 5

Author: unicodeveloper

composer.json

@@ -15,7 +15,7 @@
    ],
    "minimum-stability": "stable",
    "require": {
-    "php": "^5.4.0|^7.0",
+    "php": "^7.0",
     "illuminate/support": "5.*|6.*|^7.0",
     "guzzlehttp/guzzle": "5.*|6.*"
    },