style composer.json and modify readme

Author: slince

README.md

@@ -37,7 +37,7 @@ $ crm ls -c
 * composer       https://packagist.org
   phpcomposer    https://packagist.phpcomposer.com
   composer-proxy https://packagist.composer-proxy.org
-
+  laravel-china  https://packagist.laravel-china.org
 ```
 
 ### Switch registry

composer.json

@@ -29,5 +29,5 @@
             "Slince\\Crm\\Tests\\": "./tests"
         }
     },
-    "bin": ["bin/crm" ]
+    "bin": ["bin/crm"]
 }