Add meta_query as well

Author: swissspidy

features/post.feature

@@ -447,6 +447,12 @@ Feature: Manage WordPress posts
       | {POST_ID} | key2     | value2b    |
       | {POST_ID} | key3     | value3     |
 
+    When I run `wp post list --field=post_title --meta_query='[{"key":"key2","value":"value2b"}]'`
+    Then STDOUT should contain:
+      """
+      Test Post
+      """
+
   @less-than-wp-4.4
   Scenario: Creating/updating posts with meta keys for WP < 4.4 has no effect so should give warning
     When I try `wp post create --post_title='Test Post' --post_content='Test post content' --meta_input='{"key1":"value1","key2":"value2"}' --porcelain`

src/Post_Command.php

@@ -636,7 +636,7 @@ public function list_( $args, $assoc_args ) {
 			'posts_per_page' => -1,
 			'post_status'    => 'any',
 		];
-		$array_arguments = [ 'date_query', 'tax_query' ];
+		$array_arguments = [ 'date_query', 'tax_query', 'meta_query' ];
 		$assoc_args      = Utils\parse_shell_arrays( $assoc_args, $array_arguments );
 		$query_args      = array_merge( $defaults, $assoc_args );
 		$query_args      = self::process_csv_arguments_to_arrays( $query_args );