Merge pull request barryvdh#26 from wuwx/patch-1

Update readme.md

Author: barryvdh

readme.md

@@ -15,7 +15,7 @@ Pre Laravel 5.5: After updating composer, add the ServiceProvider to the provide
 
 You need to publish the config for this package. A sample configuration is provided. The defaults will be merged with gateway specific configuration.
 
-    $ php artisan vendor:publish
+    $ php artisan vendor:publish --provider='Barryvdh\Omnipay\ServiceProvider'
 
 To use the Facade (`Omnipay::purchase()` instead of `App::make(`omnipay`)->purchase()`), add that to the facades array.