Bump Microsoft.TestPlatform.ObjectModel from 18.0.1 to 18.3.0 (#558)

---
updated-dependencies:
- dependency-name: Microsoft.TestPlatform.ObjectModel
  dependency-version: 18.3.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]

UET/Directory.Packages.props

@@ -91,7 +91,7 @@
 		<PackageVersion Include="coverlet.collector" Version="8.0.0" />
 		<PackageVersion Include="MartinCostello.Logging.XUnit.v3" Version="0.7.0" />
 		<PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.3.0" />
-		<PackageVersion Include="Microsoft.TestPlatform.ObjectModel" Version="18.0.1" />
+		<PackageVersion Include="Microsoft.TestPlatform.ObjectModel" Version="18.3.0" />
 		<!-- Default versions for CsWin32 -->
 		<PackageVersion Include="Microsoft.Windows.CsWin32" Version="0.3.269" />
 		<PackageVersion Include="Microsoft.Windows.SDK.Win32Docs" Version="0.1.42-alpha" />