Bump xunit from 2.4.2 to 2.9.0

Bumps xunit from 2.4.2 to 2.9.0.

---
updated-dependencies:
- dependency-name: xunit
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Directory.Build.props

@@ -78,7 +78,7 @@
  <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
  </PackageReference>
 
- <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1" PrivateAssets="All" />
+ <PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0" PrivateAssets="All" />
  </ItemGroup>
 
  <ItemGroup>

test/UnitTest/UnitTest.csproj

@@ -11,9 +11,9 @@
  <PackageReference Include="Moq" Version="4.18.3" />
  <PackageReference Include="MSTest.TestAdapter" Version="3.0.1" />
  <PackageReference Include="MSTest.TestFramework" Version="3.0.1" />
- <PackageReference Include="xunit" Version="2.4.2" />
+ <PackageReference Include="xunit" Version="2.9.0" />
  <PackageReference Include="FluentAssertions" Version="6.8.0" />
- <PackageReference Include="xunit.analyzers" Version="1.1.0" />
+ <PackageReference Include="xunit.analyzers" Version="1.15.0" />
  <PackageReference Include="coverlet.collector" Version="6.0.2">
  <PrivateAssets>all</PrivateAssets>
  <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>