Set onclick listener of SimpleLibraryItem to null if no license is known

Previously, tapping on a library for which no license is known would
pop up a dialog with the license of whatever library was previously bound
to the view holder.

aboutlibraries/src/main/java/com/mikepenz/aboutlibraries/ui/item/SimpleLibraryItem.kt

@@ -64,6 +64,8 @@ class SimpleLibraryItem(internal val library: Library, private val libsBuilder:
                     openLicense(ctx, libsBuilder, library)
                 }
             }
+        } else {
+            holder.itemView.setOnClickListener(null)
         }
     }