Bump ApprovalTests from 3.0.22 to 4.0.0

Bumps [ApprovalTests](https://github.com/approvals/ApprovalTests.Net) from 3.0.22 to 4.0.0.
- [Release notes](https://github.com/approvals/ApprovalTests.Net/releases)
- [Commits](https://github.com/approvals/ApprovalTests.Net/commits)

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

Tests/Tests.csproj

@@ -12,7 +12,7 @@
     <PackageReference Include="Microsoft.Build.Tasks.Core" Version="16.0.461" />
     <PackageReference Include="Microsoft.CSharp" Version="4.5.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.1.1" />
-    <PackageReference Include="ApprovalTests" Version="3.0.22" />
+    <PackageReference Include="ApprovalTests" Version="4.0.0" />
     <PackageReference Include="ObjectApproval" Version="9.1.0" />
     <PackageReference Include="Xunit" Version="2.4.1" />
     <PackageReference Include="XunitLogger" Version="2.1.0" />