Merge branch 'next-minor'

# Conflicts:
#	resources/vanilla
#	src/plugin/PluginBase.php
#	src/plugin/PluginDescription.php
#	src/pocketmine/Player.php
#	src/pocketmine/network/rcon/RCON.php
#	src/pocketmine/network/rcon/RCONInstance.php
#	src/pocketmine/scheduler/AsyncTask.php
#	src/pocketmine/tile/Spawnable.php
#	src/scheduler/AsyncPool.php
#	src/utils/Config.php
#	src/utils/Timezone.php
#	src/utils/UUID.php
#	src/utils/Utils.php
#	src/world/format/io/region/RegionLoader.php

src/utils/Filesystem.php

@@ -58,6 +58,7 @@ final class Filesystem{
 	public static function recursiveUnlink(string $dir) : void{
 		if(is_dir($dir)){
 			$objects = scandir($dir, SCANDIR_SORT_NONE);
+			if($objects === false) throw new AssumptionFailedError("scandir() shouldn't return false when is_dir() returns true");
 			foreach($objects as $object){
 				if($object !== "." and $object !== ".."){
 					if(is_dir($dir . "/" . $object)){