Bump coverlet.collector from 1.2.0 to 1.2.1 (#146)

Bumps [coverlet.collector](https://github.com/tonerdo/coverlet) from 1.2.0 to 1.2.1.
- [Release notes](https://github.com/tonerdo/coverlet/releases)
- [Commits](https://github.com/tonerdo/coverlet/commits)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Author: dependabot-preview[bot]

Tests/Directory.Build.props

@@ -3,7 +3,7 @@
   <Import Project="$([MSBuild]::GetPathOfFileAbove('Directory.Build.props', '$(MSBuildThisFileDirectory)../'))" />
 
   <ItemGroup Label="Package References">
-    <PackageReference Include="coverlet.collector" PrivateAssets="All" Version="1.2.0">
+    <PackageReference Include="coverlet.collector" PrivateAssets="All" Version="1.2.1">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.5.0" />