Update xunit to V3 incl. dependencies (#367)

* xunit.v3 3.2.1
* xunit.runner.visualstudio 3.1.5
* Xunit.StaFact 3.0.13

Author: lg2de

tests/SimpleAccounting.IntegrationTests/SimpleAccounting.IntegrationTests.csproj

@@ -13,13 +13,13 @@
     <!-- license is BSD-3-Clause -->
     <PackageReference Include="NSubstitute" Version="5.3.0"/>
     <!-- license is apache 2.0 -->
-    <PackageReference Include="xunit" Version="2.9.3"/>
-    <PackageReference Include="xunit.runner.visualstudio" Version="3.0.1">
+    <PackageReference Include="xunit.v3" Version="3.2.1"/>
+    <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>
     <!-- license is MS.PL -->
-    <PackageReference Include="Xunit.StaFact" Version="1.1.11" />
+    <PackageReference Include="Xunit.StaFact" Version="3.0.13" />
   </ItemGroup>
   <ItemGroup>
     <Using Include="AwesomeAssertions"/>