Fix incorrect usage of isPluginEnabled

Author: RuiPereiraDev

bukkit/src/main/kotlin/com/r4g3baby/simplescore/bukkit/scoreboard/VarReplacer.kt

@@ -14,7 +14,7 @@ import kotlin.math.min
 import kotlin.math.roundToInt
 
 class VarReplacer(plugin: BukkitPlugin) : VarReplacer<Player> {
-    private val usePlaceholderAPI = plugin.server.pluginManager.isPluginEnabled("PlaceholderAPI")
+    private val usePlaceholderAPI = plugin.server.pluginManager.getPlugin("PlaceholderAPI") != null
 
     override fun replace(text: String, viewer: Player): String {
         var result = if (usePlaceholderAPI) PlaceholderAPI.setPlaceholders(viewer, text) else text

bukkit/worldguard/src/main/kotlin/com/r4g3baby/simplescore/bukkit/worldguard/WorldGuardAPI.kt

@@ -9,7 +9,7 @@ object WorldGuardAPI {
     private lateinit var worldguard: IWorldGuard
 
     fun initialize() {
-        if (!Bukkit.getPluginManager().isPluginEnabled("WorldGuard")) return
+        if (Bukkit.getPluginManager().getPlugin("WorldGuard") == null) return
 
         if (classExists("com.sk89q.worldguard.WorldGuard")) {
             worldguard = com.r4g3baby.simplescore.bukkit.worldguard.v7.WorldGuardImpl()