build(deps): bump coverlet.msbuild from 3.0.2 to 3.0.3 in /src (#343)

Bumps [coverlet.msbuild](https://github.com/coverlet-coverage/coverlet) from 3.0.2 to 3.0.3.
- [Release notes](https://github.com/coverlet-coverage/coverlet/releases)
- [Commits](https://github.com/coverlet-coverage/coverlet/commits)

Signed-off-by: dependabot[bot] <support@github.com>

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

src/Directory.build.props

@@ -33,7 +33,7 @@
     <PackageReference Include="ReactiveUI.Testing" Version="13.*" />
     <PackageReference Include="PublicApiGenerator" Version="10.2.0" />
     <PackageReference Include="NSubstitute" Version="4.2.2" />
-    <PackageReference Include="coverlet.msbuild" Version="3.0.2">
+    <PackageReference Include="coverlet.msbuild" Version="3.0.3">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>