Merge pull request #23 from poyhsiao/master

- Update composer.json to support both laravel 5.3 / 5.4 and scout 2.0 / 3.0

Author: damiantw

composer.json

@@ -11,8 +11,8 @@
     "minimum-stability": "dev",
     "require": {
         "php": ">=5.6.4",
-        "laravel/framework": "5.4.*",
-        "laravel/scout": "^2.0"
+        "laravel/framework": "5.3.*|5.4.*",
+        "laravel/scout": "^2.0|^3.0"
     },
     "autoload": {
         "psr-4": {