Bump xunit.runner.visualstudio in /src/BikeshareClient

Bumps [xunit.runner.visualstudio](https://github.com/xunit/visualstudio.xunit) from 2.5.1 to 2.5.4.
- [Release notes](https://github.com/xunit/visualstudio.xunit/releases)
- [Commits](xunit/visualstudio.xunit@2.5.1...2.5.4)

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

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

src/BikeshareClient/TestBikeshareClient/TestBikeshareClient.csproj

@@ -8,7 +8,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.1" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.4" />
     <PackageReference Include="xunit" Version="2.5.1" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />