Don't pack demo lib (#33)

Author: StefanOssendorf

Demo/Demo.Library/Demo.Library.csproj

@@ -1,8 +1,9 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
-  <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;net8.0;net9.0;net47;net471;net472;net48;net481</TargetFrameworks>
-  </PropertyGroup>
+    <PropertyGroup>
+        <TargetFrameworks>netstandard2.0;net8.0;net9.0;net47;net471;net472;net48;net481</TargetFrameworks>
+        <IsPackable>false</IsPackable>
+    </PropertyGroup>
 
     <ItemGroup>
         <PackageReference Include="Csla" />