Merge pull request #390 from kaizen365/net60

Include .NET 6.0 as Target Framework for Mapster.Tool

Author: eswann

src/Mapster.Tool/Mapster.Tool.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFrameworks>netcoreapp3.1;net5.0</TargetFrameworks>
+    <TargetFrameworks>netcoreapp3.1;net5.0;net6.0</TargetFrameworks>
     <IsPackable>true</IsPackable>
     <PackAsTool>true</PackAsTool>
     <ToolCommandName>dotnet-mapster</ToolCommandName>