Update dependency xunit.v3 to 2.0.3 (#121)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

test/Serilog.Sinks.XUnit.Injectable.Tests.csproj

@@ -20,7 +20,7 @@
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
             <PrivateAssets>all</PrivateAssets>
         </PackageReference>
-        <PackageReference Include="xunit.v3" Version="2.0.2" />
+        <PackageReference Include="xunit.v3" Version="2.0.3" />
     </ItemGroup>
 
     <ItemGroup>