Add missing licensekey version attribute

Author: IdamkinI

itext/itext.html2pdf/Properties/AssemblyInfo.cs

@@ -24,3 +24,5 @@
 [assembly: AssemblyVersion("1.1.0.0")]
 [assembly: AssemblyFileVersion("1.1.0.0")]
 [assembly: AssemblyInformationalVersion("1.1.0-SNAPSHOT")]
+
+[assembly: Versions.Attributes.KeyVersion("3.0.0.0")]