Bump xunit.runner.visualstudio from 2.5.6 to 2.8.2

Bumps [xunit.runner.visualstudio](https://github.com/xunit/visualstudio.xunit) from 2.5.6 to 2.8.2.
- [Release notes](https://github.com/xunit/visualstudio.xunit/releases)
- [Commits](xunit/visualstudio.xunit@2.5.6...2.8.2)

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

Signed-off-by: dependabot[bot] <[email protected]>

MessagePack.NodaTime.Tests/MessagePack.NodaTime.Tests.csproj

@@ -18,7 +18,7 @@
       <Version>2.9.0</Version>
     </PackageReference>
     <PackageReference Include="xunit.runner.visualstudio">
-      <Version>2.5.6</Version>
+      <Version>2.8.2</Version>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>