Update TUnit to 0.20.0

---
updated-dependencies:
- dependency-name: TUnit
  dependency-version: 0.20.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

test/TestHost.Abstracts.Tests/TestHost.Abstracts.Tests.csproj

@@ -9,7 +9,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="TUnit" Version="0.19.148" />
+    <PackageReference Include="TUnit" Version="0.20.0" />
   </ItemGroup>
 
   <ItemGroup>