⬆️ Update Testing Packages (#148)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [xunit](https://github.com/xunit/xunit) | `2.8.1` -> `2.9.0` |
[![age](https://developer.mend.io/api/mc/badges/age/nuget/xunit/2.9.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/nuget/xunit/2.9.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/nuget/xunit/2.8.1/2.9.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/nuget/xunit/2.8.1/2.9.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
|
[xunit.runner.visualstudio](https://github.com/xunit/visualstudio.xunit)
| `2.8.1` -> `2.8.2` |
[![age](https://developer.mend.io/api/mc/badges/age/nuget/xunit.runner.visualstudio/2.8.2?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/nuget/xunit.runner.visualstudio/2.8.2?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/nuget/xunit.runner.visualstudio/2.8.1/2.8.2?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
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|

---

### Release Notes

<details>
<summary>xunit/xunit (xunit)</summary>

### [`v2.9.0`](https://github.com/xunit/xunit/compare/2.8.1...2.9.0)

[Compare Source](https://github.com/xunit/xunit/compare/2.8.1...2.9.0)

</details>

<details>
<summary>xunit/visualstudio.xunit (xunit.runner.visualstudio)</summary>

###
[`v2.8.2`](https://github.com/xunit/visualstudio.xunit/compare/2.8.1...2.8.2)

[Compare
Source](https://github.com/xunit/visualstudio.xunit/compare/2.8.1...2.8.2)

</details>

---

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Directory.Packages.props

@@ -9,7 +9,7 @@
     <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="8.0.0" developmentDependency="true" />
     <PackageVersion Include="coverlet.collector" Version="6.0.2" developmentDependency="true" />
     <PackageVersion Include="coverlet.msbuild" Version="6.0.2" developmentDependency="true" />
-    <PackageVersion Include="xunit" Version="2.8.1" developmentDependency="true" />
-    <PackageVersion Include="xunit.runner.visualstudio" Version="2.8.1" developmentDependency="true" />
+    <PackageVersion Include="xunit" Version="2.9.0" developmentDependency="true" />
+    <PackageVersion Include="xunit.runner.visualstudio" Version="2.8.2" developmentDependency="true" />
   </ItemGroup>
 </Project>