Bump Shouldly from 4.2.1 to 4.3.0

Bumps [Shouldly](https://github.com/shouldly/shouldly) from 4.2.1 to 4.3.0.
- [Release notes](https://github.com/shouldly/shouldly/releases)
- [Changelog](https://github.com/shouldly/shouldly/blob/master/BREAKING%20CHANGES.txt)
- [Commits](shouldly/shouldly@4.2.1...4.3.0)

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

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

Author: dependabot[bot]

tests/DendroDocs.Shared.Tests/DendroDocs.Shared.Tests.csproj

@@ -23,7 +23,7 @@
     <PackageReference Include="coverlet.collector" Version="6.0.4" PrivateAssets="all">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="Shouldly" Version="4.2.1" />
+    <PackageReference Include="Shouldly" Version="4.3.0" />
   </ItemGroup>
 
   <ItemGroup>