Update EntityExtensions.kt

src/main/kotlin/net/axay/kspigot/extensions/bukkit/EntityExtensions.kt

@@ -81,4 +81,11 @@ fun Player.disappear(plugin: Plugin) {
  */
 fun Player.appear(plugin: Plugin) {
     onlinePlayers.filter { it != this }.forEach { it.showPlayer(plugin, this) }
+}
+
+/**
+ * Kicks the player from the server.
+ */
+fun Player.kick(reason: String? = "You got kicked!") {
+    kickPlayer(reason)
 }