add 'global_unique_id' to product generator (#172)

* add 'global_unique_id' to product generator

Author: masteradhoc

includes/Generator/Product.php

@@ -301,6 +301,7 @@ protected static function generate_variable_product() {
 			'name'              => $name,
 			'featured'          => self::$faker->boolean( 10 ),
 			'sku'               => sanitize_title( $name ) . '-' . self::$faker->ean8,
+			'global_unique_id'   => self::$faker->randomElement( [ self::$faker->ean13, self::$faker->isbn10 ] ),
 			'attributes'        => $attributes,
 			'tax_status'        => 'taxable',
 			'tax_class'         => '',
@@ -383,6 +384,7 @@ protected static function generate_simple_product() {
 			'description'        => self::$faker->paragraphs( self::$faker->numberBetween( 1, 5 ), true ),
 			'short_description'  => self::$faker->text(),
 			'sku'                => sanitize_title( $name ) . '-' . self::$faker->ean8,
+			'global_unique_id'   => self::$faker->randomElement( [ self::$faker->ean13, self::$faker->isbn10 ] ),
 			'regular_price'      => $price,
 			'sale_price'         => $sale_price,
 			'date_on_sale_from'  => '',