docs(readme): Update README.md and README-zh_CN.md

- Update usage information in README.md and README-zh_CN.md
- Add gif usage example in README.md and README-zh_CN.md
- Add testing information in README.md and README-zh_CN.md

Author: guanguans

README-zh_CN.md

@@ -39,7 +39,21 @@ composer require guanguans/music-dl:dev-master --dev -v --ignore-platform-req=ex
 ## 使用
 
 ```shell
-╰─ ./music-dl --help                                                                                                      ─╯
+╰─ ./music-dl list                                                                                                        ─╯
+
+  Music DL  refs/tags/4.1.6
+
+  USAGE:  <command> [options] [arguments]
+
+  completion  Dump the shell completion script
+  inspire     Display an inspiring quote
+  music       Search and download music
+  self-update Allows to self-update a build application
+  thanks      Thanks for using this tool.
+```
+
+```shell
+╰─ ./music-dl music --help                                                                                                      ─╯
 Description:
   Search and download music
 
@@ -63,22 +77,14 @@ Options:
   -v|vv|vvv, --verbose     Increase the verbosity of messages: 1 for normal output, 2 for more verbose output and 3 for debug
 ```
 
-```shell
-╰─ ./music-dl list                                                                                                        ─╯
-
-  Music DL  refs/tags/4.1.6
+![usage](resources/music-dl.gif)
 
-  USAGE:  <command> [options] [arguments]
+## 测试
 
-  completion  Dump the shell completion script
-  inspire     Display an inspiring quote
-  music       Search and download music
-  self-update Allows to self-update a build application
-  thanks      Thanks for using this tool.
+```bash
+composer test
 ```
 
-![vhs](resources/music-dl.gif)
-
 ## 变更日志
 
 请参阅 [CHANGELOG](CHANGELOG.md) 获取最近有关更改的更多信息。

README.md

@@ -39,7 +39,21 @@ composer require guanguans/music-dl:dev-master --dev -v --ignore-platform-req=ex
 ## Usage
 
 ```shell
-╰─ ./music-dl --help                                                                                                      ─╯
+╰─ ./music-dl list                                                                                                        ─╯
+
+  Music DL  refs/tags/4.1.6
+
+  USAGE:  <command> [options] [arguments]
+
+  completion  Dump the shell completion script
+  inspire     Display an inspiring quote
+  music       Search and download music
+  self-update Allows to self-update a build application
+  thanks      Thanks for using this tool.
+```
+
+```shell
+╰─ ./music-dl music --help                                                                                                      ─╯
 Description:
   Search and download music
 
@@ -63,22 +77,14 @@ Options:
   -v|vv|vvv, --verbose     Increase the verbosity of messages: 1 for normal output, 2 for more verbose output and 3 for debug
 ```
 
-```shell
-╰─ ./music-dl list                                                                                                        ─╯
-
-  Music DL  refs/tags/4.1.6
+![usage](resources/music-dl.gif)
 
-  USAGE:  <command> [options] [arguments]
+## Testing
 
-  completion  Dump the shell completion script
-  inspire     Display an inspiring quote
-  music       Search and download music
-  self-update Allows to self-update a build application
-  thanks      Thanks for using this tool.
+```bash
+composer test
 ```
 
-![vhs](resources/music-dl.gif)
-
 ## Changelog
 
 Please see [CHANGELOG](CHANGELOG.md) for more information on what has changed recently.