VerbAttribute violates CS3016 code inspection

**Describe the bug**
VerbAttribute current accepts a string array for aliases, making it non-compliant with CLS standards.

**To Reproduce**
* Create a solution targeting .NET Framework 4.8
* Create a project which targets .NET Framework 4.8 AND .NET Standard 2.1: `net48;netstandard2.1`
* Create a class which uses a Verb attribute (in either project) such as:

```
[Verb("MyVerb", HelpText = "MyVerb HelpText")]
public class MyClassWithVerb { }
```

**Expected behavior**
No code analysis/compiler warnings.

**Additional context**
The following code analysis compiler warning is received when using `VerbAttribute`:

```
Severity Code Description Project File Line Suppression State
Warning CS3016 Arrays as attribute arguments is not CLS-compliant MyProject C:\Path\To\Source\MyClass.cs 14 Active
```

首先定位 VerbAttribute，並檢查其別名在屬性宣告中的表示方式。使用 issue 中描述的 .NET Framework 4.8 和 .NET Standard 2.1 目標重現 CS3016 警告。完成的標準是 sample 不產生 CLS 警告，同時 VerbAttribute 繼續支援其文件所述的用法。

由索引模型根據 Issue 內容生成。