Build tlycken.Extensions for full .NET Framework too

Author: Tomas Lycken

src/tlycken.Extensions/tlycken.Extensions.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>net461;netstandard2.0</TargetFrameworks>
 
     <Version>0.0.0</Version>
     <PackageVersion>0.0.0</PackageVersion>