PHP8.1 specific fix

Author: rkrx

src/Builder/RunnableSelect.php

@@ -5,6 +5,7 @@
 use IteratorAggregate;
 use Kir\MySQL\Tools\AliasReplacer;
 use Kir\MySQL\Builder\Helpers\DBIgnoreRow;
+use Traversable;
 
 /**
  * @extends IteratorAggregate<int, array<string, mixed>>
@@ -118,7 +119,7 @@ public function fetchValue($default = null, ?callable $fn = null);
 	public function getFoundRows(): int;
 
 	/**
-	 * @return Generator<int, array<string, mixed>>
+	 * @return Traversable<int, array<string, mixed>>
 	 */
-	public function getIterator();
+	public function getIterator(): Traversable;
 }

src/Databases/MySQL/MySQLRunnableSelect.php

@@ -12,6 +12,7 @@
 use PDO;
 use stdClass;
 use Throwable;
+use Traversable;
 
 /**
  */
@@ -236,9 +237,9 @@ private function createStatement(): QueryStatement {
 	}
 
 	/**
-	 * @return Generator<int, array<string, mixed>>
+	 * @return Traversable<int, array<string, mixed>>
 	 */
-	public function getIterator() {
+	public function getIterator(): Traversable {
 		yield from $this->fetchRowsLazy();
 	}