Bump ApprovalTests from 3.0.18 to 3.0.19

Bumps [ApprovalTests](https://github.com/approvals/ApprovalTests.Net) from 3.0.18 to 3.0.19.
- [Release notes](https://github.com/approvals/ApprovalTests.Net/releases)
- [Commits](https://github.com/approvals/ApprovalTests.Net/commits)

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

Tests/Tests.csproj

@@ -10,7 +10,7 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.9.0" />
-    <PackageReference Include="ApprovalTests" Version="3.0.18" />
+    <PackageReference Include="ApprovalTests" Version="3.0.19" />
     <PackageReference Include="Moq" Version="4.10.1" />
     <PackageReference Include="ObjectApproval" Version="6.0.0" />
     <PackageReference Include="xunit" Version="2.4.1" />