Use wp_set_object_terms for yaml categories

Bypasses the is_int check in wp_set_post_terms which stops assignement of cats via slugs for hierarchical taxonomies.

Author: tcrsavage

inc/class-importer.php

@@ -335,7 +335,7 @@ protected function update_post_from_markdown_source( $post_id ) {
 }
 }
 if ( isset( $yaml['categories'] ) && is_array( $yaml['categories'] ) && is_object_in_taxonomy( $this->get_post_type(), 'category' ) ) {
-wp_set_post_terms( $post_id, array_map( 'wp_slash', $yaml['categories'] ), 'category' );
+wp_set_object_terms( $post_id, array_map( 'wp_slash', $yaml['categories'] ), 'category' );
 }
 if ( isset( $yaml['tags'] ) && is_array( $yaml['tags'] ) && is_object_in_taxonomy( $this->get_post_type(), 'post_tag' ) ) {
 wp_set_post_terms( $post_id, array_map( 'wp_slash', $yaml['tags'] ), 'post_tag' );