Fix test dependencies

Author: yousif-bugsnag

tests/Bugsnag.AspNet.Core.Tests/Bugsnag.AspNet.Core.Tests.csproj

@@ -7,7 +7,6 @@
     <ProduceReferenceAssembly>false</ProduceReferenceAssembly>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Microsoft.AspNetCore.TestHost" Version="2.3.0" />
     <PackageReference Include="Microsoft.AspNetCore.Diagnostics" Version="2.3.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.13.0" />
     <PackageReference Include="xunit" Version="2.9.3" />
@@ -16,6 +15,12 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
   </ItemGroup>
+  <ItemGroup Condition="'$(TargetFramework)' == 'net6.0'">
+    <PackageReference Include="Microsoft.AspNetCore.TestHost" Version="6.0.36" />
+  </ItemGroup>
+  <ItemGroup Condition="'$(TargetFramework)' == 'net8.0'">
+    <PackageReference Include="Microsoft.AspNetCore.TestHost" Version="8.0.14" />
+  </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\..\src\Bugsnag.AspNet.Core\Bugsnag.AspNet.Core.csproj" />
     <ProjectReference Include="..\..\tests\Bugsnag.Tests.Server\Bugsnag.Tests.Server.csproj" />