Upgrade nuget package NewStyleCop.Analyzers

Author: bjornhellander

StyleCop.Analyzers/Directory.Build.props

@@ -53,7 +53,7 @@
   <ItemGroup>
     <PackageReference Include="AsyncUsageAnalyzers" Version="1.0.0-alpha003" PrivateAssets="all" />
     <PackageReference Include="DotNetAnalyzers.DocumentationAnalyzers" Version="1.0.0-beta.46" PrivateAssets="all" />
-    <PackageReference Include="NewStyleCop.Analyzers" Version="1.2.0-alpha.1" PrivateAssets="all" />
+    <PackageReference Include="NewStyleCop.Analyzers" Version="1.2.0" PrivateAssets="all" />
     <PackageReference Include="Microsoft.CodeAnalysis.Analyzers" Version="3.11.0" PrivateAssets="all" />
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp.CodeStyle" Version="4.0.1" PrivateAssets="all" />
   </ItemGroup>