Bump coverlet.msbuild from 3.0.3 to 3.1.0

Bumps [coverlet.msbuild](https://github.com/coverlet-coverage/coverlet) from 3.0.3 to 3.1.0.
- [Release notes](https://github.com/coverlet-coverage/coverlet/releases)
- [Commits](https://github.com/coverlet-coverage/coverlet/commits/v3.1.0)

---
updated-dependencies:
- dependency-name: coverlet.msbuild
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

XmlSchemaClassGenerator.Tests/XmlSchemaClassGenerator.Tests.csproj

@@ -19,7 +19,7 @@
  <ProjectReference Include="..\XmlSchemaClassGenerator\XmlSchemaClassGenerator.csproj" />
  </ItemGroup>
  <ItemGroup>
- <PackageReference Include="coverlet.msbuild" Version="3.0.3">
+ <PackageReference Include="coverlet.msbuild" Version="3.1.0">
  <PrivateAssets>all</PrivateAssets>
  <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
  </PackageReference>