Update dependencies for test project (#15)

Updated target framework from `net461` to `net472`, retaining `net6.0`.
Updated `Microsoft.NET.Test.Sdk` from `17.2.0-preview-20220401-08` to `17.11.1`.
Updated `xunit` from `2.4.2-pre.12` to `2.9.2`.
Updated `xunit.runner.visualstudio` from `2.4.3` to `2.8.2`.
Updated `coverlet.collector` from `3.1.2` to `6.0.2`.

src/Dax.Formatter.Tests/Dax.Formatter.Tests.csproj

@@ -1,20 +1,20 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net461;net6.0</TargetFrameworks>
+    <TargetFrameworks>net472;net6.0</TargetFrameworks>
     <LangVersion>latest</LangVersion>
     <Nullable>enable</Nullable>
     <IsPackable>false</IsPackable>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.2.0-preview-20220401-08" />
-    <PackageReference Include="xunit" Version="2.4.2-pre.12" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3">
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.1" />
+    <PackageReference Include="xunit" Version="2.9.2" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="coverlet.collector" Version="3.1.2">
+    <PackageReference Include="coverlet.collector" Version="6.0.2">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>