Bump Microsoft.TestPlatform.ObjectModel from 15.5.0 to 17.14.1

---
updated-dependencies:
- dependency-name: Microsoft.TestPlatform.ObjectModel
  dependency-version: 17.14.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

Directory.Packages.props

@@ -4,7 +4,7 @@
         <CentralPackageTransitivePinningEnabled>false</CentralPackageTransitivePinningEnabled>
     </PropertyGroup>
     <ItemGroup>
-        <PackageVersion Include="Microsoft.TestPlatform.ObjectModel" Version="15.5.0" />
+        <PackageVersion Include="Microsoft.TestPlatform.ObjectModel" Version="17.14.1" />
         <PackageVersion Include="Newtonsoft.Json" Version="13.0.3" />
 
         <PackageVersion Include="Stylecop.Analyzers" Version="1.1.118" />