Update test target frameworks

Author: khellang

test/Directory.Build.props

@@ -3,21 +3,21 @@
     <OutputType>Exe</OutputType>
     <IsPackable>False</IsPackable>
     <LangVersion>9.0</LangVersion>
-    <TargetFrameworks>netcoreapp3.1;net5.0</TargetFrameworks>
+    <TargetFrameworks>netcoreapp3.1;net6.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
-    <PackageReference Include="Microsoft.AspNetCore.TestHost" Version="3.1.0" />
+    <PackageReference Include="Microsoft.AspNetCore.TestHost" Version="3.1.23" />
     <FrameworkReference Include="Microsoft.AspNetCore.App" />
   </ItemGroup>
 
-  <ItemGroup Condition="'$(TargetFramework)' == 'net5.0'">
-    <PackageReference Include="Microsoft.AspNetCore.TestHost" Version="5.0.4" />
+  <ItemGroup Condition="'$(TargetFramework)' == 'net6.0'">
+    <PackageReference Include="Microsoft.AspNetCore.TestHost" Version="6.0.3" />
     <FrameworkReference Include="Microsoft.AspNetCore.App" />
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.3.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.1.0" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.1" />
   </ItemGroup>

test/ProblemDetails.Tests/ProblemDetails.Tests.csproj

@@ -1,8 +1,7 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <AssemblyName>Hellang.Middleware.ProblemDetails.Tests</AssemblyName>
     <RootNamespace>ProblemDetails.Tests</RootNamespace>
-    <TargetFrameworks>netcoreapp3.1;net5.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>

test/RateLimiting.Tests/RateLimiting.Tests.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk" ToolsVersion="15.0">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <AssemblyName>Hellang.Middleware.RateLimiting.Tests</AssemblyName>
     <RootNamespace>RateLimiting.Tests</RootNamespace>