more missed function imports

src/pocketmine/plugin/PluginDescription.php

@@ -38,6 +38,7 @@ use function strlen;
 use function strtoupper;
 use function substr;
 use function version_compare;
+use function yaml_parse;
 
 class PluginDescription{
 	private $map;

src/pocketmine/plugin/PluginManager.php

@@ -40,6 +40,7 @@ use pocketmine\timings\TimingsHandler;
 use pocketmine\utils\Utils;
 use function array_intersect;
 use function array_map;
+use function array_merge;
 use function array_pad;
 use function class_exists;
 use function count;