Fix root namespace

Signed-off-by: Aliaksandr Kukrash <multiarc@gmail.com>

Author: multiarc

Tools/Schema.NET.Tool.VisualStudio/Schema.NET.Tool.VisualStudio.csproj

@@ -1,10 +1,11 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup Label="Build">
-    <TargetFrameworks>netstandard2.0</TargetFrameworks>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <IsPackable>false</IsPackable>
     <IsRoslynComponent>true</IsRoslynComponent>
     <EnforceExtendedAnalyzerRules>true</EnforceExtendedAnalyzerRules>
+    <RootNamespace>Schema.NET.Tool</RootNamespace>
   </PropertyGroup>
 
   <ItemGroup Label="Package References">