Dependencies for version 2.* updated

Author: Afonso Gloeden

composer.json

@@ -17,8 +17,10 @@
     ],
     "license": "GPL-2.0-only",
     "require": {
-        "php": ">=5.5",
-        "laravel/framework": "5.*"
+        "php": ">=5.6.4",
+        "doctrine/dbal": "^2.9",
+        "illuminate/database": "^5.4",
+        "illuminate/support": "^5.4"
     },
     "require-dev": {},
     "config": {