Address code review feedback

Author: alcaeus

src/Database.php

@@ -24,7 +24,7 @@
 use MongoDB\Builder\Pipeline;
 use MongoDB\Codec\Encoder;
 use MongoDB\Driver\ClientEncryption;
-use MongoDB\Driver\Cursor;
+use MongoDB\Driver\CursorInterface;
 use MongoDB\Driver\Exception\RuntimeException as DriverRuntimeException;
 use MongoDB\Driver\Manager;
 use MongoDB\Driver\ReadConcern;
@@ -52,7 +52,6 @@
 use MongoDB\Operation\Watch;
 use stdClass;
 use Throwable;
-use Traversable;
 
 use function is_array;
 use function strlen;
@@ -191,13 +190,12 @@ public function __toString(): string
      * @see Aggregate::__construct() for supported options
      * @param array $pipeline Aggregation pipeline
      * @param array $options  Command options
-     * @return Traversable
      * @throws UnexpectedValueException if the command response was malformed
      * @throws UnsupportedException if options are not supported by the selected server
      * @throws InvalidArgumentException for parameter/option parsing errors
      * @throws DriverRuntimeException for other driver errors (e.g. connection errors)
      */
-    public function aggregate(array $pipeline, array $options = []): Traversable
+    public function aggregate(array $pipeline, array $options = []): CursorInterface&Iterator
     {
         if (is_builder_pipeline($pipeline)) {
             $pipeline = new Pipeline(...$pipeline);
@@ -250,7 +248,7 @@ public function aggregate(array $pipeline, array $options = []): Traversable
      * @throws InvalidArgumentException for parameter/option parsing errors
      * @throws DriverRuntimeException for other driver errors (e.g. connection errors)
      */
-    public function command(array|object $command, array $options = []): Cursor
+    public function command(array|object $command, array $options = []): CursorInterface&Iterator
     {
         if (! isset($options['typeMap'])) {
             $options['typeMap'] = $this->typeMap;