Upgrade Microsoft.NET.Test.Sdk package to v17.2.0

Author: YevgeniyShunevych

Atata.Cli.HtmlValidate.sln

@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio Version 16
-VisualStudioVersion = 16.0.31229.75
+# Visual Studio Version 17
+VisualStudioVersion = 17.2.32630.192
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Atata.Cli.HtmlValidate", "src\Atata.Cli.HtmlValidate\Atata.Cli.HtmlValidate.csproj", "{8138E732-7FBE-4495-AABD-C3A88F36351D}"
 EndProject

test/Atata.Cli.HtmlValidate.IntegrationTests/Atata.Cli.HtmlValidate.IntegrationTests.csproj

@@ -6,7 +6,7 @@
 
   <ItemGroup>
     <PackageReference Include="Atata" Version="2.1.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.1.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.2.0" />
     <PackageReference Include="NUnit" Version="3.13.3" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.2.1" />
   </ItemGroup>