update readme.md and composer.json

Author: EVA09

README.md

@@ -10,7 +10,7 @@ cropper extension for laravel-admin
 ## 安装
 
 ```bash
-composer require laravel-admin-ext-unofficial/cropper
+composer require laravel-admin-ext/cropper
 ```
 
 然后
@@ -39,7 +39,7 @@ php artisan vendor:publish --tag=laravel-admin-cropper
 
 在form表单中使用它：
 ```php
-$form->cropper('content');
+$form->cropper('content','label');
 ```
 默认模式是自由剪裁模式，如果需要强制剪裁尺寸，请使用（注意该尺寸就是最后得到的图片尺寸 非“比例”）
 ```php
@@ -57,7 +57,6 @@ $form->cropper('content','label')->cRatio($width,$height);
 当然，因为继承了ImageField类，所以也能使用 “intervention/image” 的各种(crop,fit,insert)方法
 （前提是你已经composer require intervention/image）
 
-
 License
 ------------
 Licensed under [The MIT License (MIT)](LICENSE).

composer.json

@@ -1,9 +1,9 @@
 {
-    "name": "laravel-admin-ext-unofficial/cropper",
+    "name": "laravel-admin-ext/cropper",
     "description": "Integrate Cropper into laravel-admin",
     "type": "library",
     "keywords": ["laravel-admin", "extension","cropper","image"],
-    "homepage": "https://github.com/EVA09/cropper",
+    "homepage": "https://github.com/laravel-admin-extensions/cropper",
     "license": "MIT",
     "authors": [
         {