Test project isn't packable

Author: kzu

src/ThisAssembly.Tests/ThisAssembly.Tests.csproj

@@ -1,6 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
+    <IsPackable>false</IsPackable>
     <TargetFramework>net6.0</TargetFramework>
     <TargetFramework Condition="'$(BuildingInsideVisualStudio)' == 'true'">net472</TargetFramework>
     <RootNamespace>ThisAssemblyTests</RootNamespace>
@@ -27,7 +28,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="3.8.0" Pack="false" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.0.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.1.0" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3" />
   </ItemGroup>