Update vstest monorepo to v17 (major) (#80)

Co-authored-by: Renovate Bot <[email protected]>

Author: renovate[bot]

Directory.Packages.props

@@ -3,8 +3,8 @@
   <ItemGroup>
     <PackageVersion Include="Expecto" Version="[9.0, 10.0)" />
     <PackageVersion Include="FSharp.Core" Version="[4.6.0,)" />
-    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="16.11.0" />
-    <PackageVersion Include="Microsoft.TestPlatform.ObjectModel" Version="16.11.0" />
+    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.0.0" />
+    <PackageVersion Include="Microsoft.TestPlatform.ObjectModel" Version="17.0.0" />
     <PackageVersion Include="System.Collections.Immutable" Version="[1.5.0,)" />
   </ItemGroup>