Update composer.json

Author: barryvdh

composer.json

@@ -10,10 +10,10 @@
         }
     ],
     "require": {
-        "php": ">=5.6.0",
-        "illuminate/support": "^5.1,<5.8",
-        "illuminate/console": "^5.1,<5.8",
-        "illuminate/filesystem": "^5.1,<5.8",
+        "php": ">=7",
+        "illuminate/support": "^5.5,<5.8",
+        "illuminate/console": "^5.5,<5.8",
+        "illuminate/filesystem": "^5.5,<5.8",
         "barryvdh/reflection-docblock": "^2.0.4",
         "composer/composer": "^1.6"
     },