enabled internal visibles in release mode

Author: vpenades

src/Directory.Build.props

@@ -26,7 +26,9 @@
 
   <!-- Testing & Analysers =================================================================================== -->
 
-  <ItemGroup Condition=" '$(Configuration)' == 'Debug' ">
+  <!-- Condition=" '$(Configuration)' == 'Debug' " -->
+  
+  <ItemGroup>
     <InternalsVisibleTo Include="SharpGLTF.Core.Tests"/>
     <InternalsVisibleTo Include="SharpGLTF.Toolkit.Tests"/>
     <InternalsVisibleTo Include="SharpGLTF.Ext.3DTiles.Tests"/>