Highlighter: Added FEATURE_CLONEABLE for .NET Core
Highlighter: Added FEATURE_CLONEABLE for .NET Core

jeme/lucenenet,NightOwl888/lucenenet,apache/lucenenet,laimis/lucenenet,apache/lucenenet,NightOwl888/lucenenet,laimis/lucenenet,NightOwl888/lucenenet,sisve/lucenenet,jeme/lucenenet,apache/lucenenet,jeme/lucenenet,sisve/lucenenet,jeme/lucenenet,NightOwl888/lucenenet,apache/lucenenet