Added entity kill operation cache.

src/main/java/dev/micle/xptools/config/Config.java

@@ -131,6 +131,7 @@ public final class Config {
         private static void onConfigReload() {
             // Clear cache
             OperationCache.clearBlockBreakCache();
+            OperationCache.clearEntityKillCache();
 
             // Parse all block break global operations
             blockBreakGlobalOperationItems = new ArrayList<>();