Bump the nugets group with 3 updates (#87)

Bumps the nugets group with 3 updates: Microsoft.VisualStudio.SDK, [xunit](https://github.com/xunit/xunit) and [xunit.runner.visualstudio](https://github.com/xunit/visualstudio.xunit).


Updates `Microsoft.VisualStudio.SDK` from 17.7.37327 to 17.10.39856

Updates `xunit` from 2.5.0 to 2.7.0
- [Commits](xunit/xunit@2.5.0...2.7.0)

Updates `xunit.runner.visualstudio` from 2.5.0 to 2.5.7
- [Release notes](https://github.com/xunit/visualstudio.xunit/releases)
- [Commits](xunit/visualstudio.xunit@2.5.0...2.5.7)

---
updated-dependencies:
- dependency-name: Microsoft.VisualStudio.SDK
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: nugets
- dependency-name: xunit
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: nugets
- dependency-name: xunit.runner.visualstudio
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: nugets
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

src/Vsix/Merq.Vsix.IntegrationTests/Merq.Vsix.IntegrationTests.csproj

@@ -8,11 +8,11 @@
 
   <ItemGroup>
     <PackageReference Include="ThisAssembly.Project" Version="1.1.3" PrivateAssets="all" />
-    <PackageReference Include="xunit" Version="2.5.0" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.0" />
+    <PackageReference Include="xunit" Version="2.7.0" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.7" />
     <PackageReference Include="xunit.runner.msbuild" Version="2.7.0" />
     <PackageReference Include="xunit.vsix" Version="0.9.3" />
-    <PackageReference Include="Microsoft.VisualStudio.SDK" Version="17.7.37327" />
+    <PackageReference Include="Microsoft.VisualStudio.SDK" Version="17.10.39856" />
     <PackageReference Include="System.Reactive" Version="6.0.0" />
     <PackageReference Include="Merq" Version="1.5.0" />
   </ItemGroup>