Update composer.json for Laravel 5.4

Author: jijoel

composer.json

@@ -5,9 +5,9 @@
     "license": "MIT",
     "require": {
         "php": ">=5.6.0",
-        "illuminate/support": "5.0.x|5.1.x|5.2.x|5.3.x",
-        "illuminate/console": "5.0.x|5.1.x|5.2.x|5.3.x",
-        "illuminate/filesystem": "5.0.x|5.1.x|5.2.x|5.3.x",
+        "illuminate/support": "^5.0",
+        "illuminate/console": "^5.0",
+        "illuminate/filesystem": "^5.0",
         "symfony/class-loader": "^2.3|3.*",
         "doctrine/dbal": "~2.3"
     },