chore(deps): Bump Tomlyn.Signed from 0.17.0 to 0.18.0 (#690)

Bumps [Tomlyn.Signed](https://github.com/xoofx/Tomlyn) from 0.17.0 to 0.18.0.
- [Release notes](https://github.com/xoofx/Tomlyn/releases)
- [Changelog](https://github.com/xoofx/Tomlyn/blob/main/changelog.md)
- [Commits](xoofx/Tomlyn@0.17.0...0.18.0)

---
updated-dependencies:
- dependency-name: Tomlyn.Signed
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Client.Test/Client.Test.csproj

@@ -15,7 +15,7 @@
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
         <PackageReference Include="Moq" Version="4.20.69" />
         <PackageReference Include="NUnit3TestAdapter" Version="4.6.0" />
-        <PackageReference Include="Tomlyn.Signed" Version="0.17.0" />
+        <PackageReference Include="Tomlyn.Signed" Version="0.18.0" />
     </ItemGroup>
 
     <ItemGroup>