Bump Microsoft.TestPlatform.ObjectModel from 17.5.0 to 17.6.0 (#143)

Bumps [Microsoft.TestPlatform.ObjectModel](https://github.com/microsoft/vstest) from 17.5.0 to 17.6.0.
- [Release notes](https://github.com/microsoft/vstest/releases)
- [Changelog](https://github.com/microsoft/vstest/blob/main/docs/releases.md)
- [Commits](microsoft/vstest@v17.5.0...v17.6.0)

---
updated-dependencies:
- dependency-name: Microsoft.TestPlatform.ObjectModel
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

src/Machine.Specifications.Runner.VisualStudio.Specs/Machine.Specifications.Runner.VisualStudio.Specs.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFrameworks>netcoreapp3.1;net472</TargetFrameworks>
@@ -9,7 +9,7 @@
     <PackageReference Include="Machine.Fakes.Moq" Version="2.11.0" />
     <PackageReference Include="Machine.Specifications.Should" Version="1.0.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.4.1" />
-    <PackageReference Include="Microsoft.TestPlatform.ObjectModel" Version="17.5.0" />
+    <PackageReference Include="Microsoft.TestPlatform.ObjectModel" Version="17.6.0" />
   </ItemGroup>
 
   <ItemGroup>

src/Machine.Specifications.Runner.VisualStudio/Machine.Specifications.Runner.VisualStudio.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <Version>0.1.0</Version>
@@ -19,7 +19,7 @@
 
   <ItemGroup>
     <PackageReference Include="Machine.Specifications" Version="1.1.1" PrivateAssets="All" />
-    <PackageReference Include="Microsoft.TestPlatform.ObjectModel" Version="17.5.0" PrivateAssets="All" />
+    <PackageReference Include="Microsoft.TestPlatform.ObjectModel" Version="17.6.0" PrivateAssets="All" />
   </ItemGroup>
 
   <ItemGroup>