add some phpstan array types

src/pocketmine/level/format/io/LevelProvider.php

@@ -54,6 +54,7 @@ interface LevelProvider{
 	 * Generate the needed files in the path given
 	 *
 	 * @param mixed[] $options
+	 * @phpstan-param array<string, mixed> $options
 	 *
 	 * @return void
 	 */
@@ -66,6 +67,7 @@ interface LevelProvider{
 
 	/**
 	 * @return mixed[]
+	 * @phpstan-return array<string, mixed>
 	 */
 	public function getGeneratorOptions() : array;
 

src/pocketmine/level/format/io/LevelProviderManager.php

@@ -31,7 +31,10 @@ use function strtolower;
 use function trim;
 
 abstract class LevelProviderManager{
-	/** @var string[] */
+	/**
+	 * @var string[]
+	 * @phpstan-var array<string, class-string<LevelProvider>>
+	 */
 	protected static $providers = [];
 
 	public static function init() : void{