Fix deprecation notice for str_getcsv() escape param.

Author: peterwilsoncc

tests/phpunit/Unit/Admin/Export/Service/ProductExportServiceTest.php

@@ -150,7 +150,12 @@ public function test_handle_batch_first_batch_sets_file_path_and_schedules_next(
 
 		$this->assertFileExists( $file_path );
 
-		$csv = array_map( 'str_getcsv', file( $file_path ) );
+		$csv = array_map(
+			static function( $line ) {
+				return str_getcsv( $line, ',', '"', '\\' );
+			},
+			file( $file_path )
+		);
 
 		$this->assertEquals(
 			array( 'id', 'title', 'description', 'link', 'image_link', 'price', 'sale_price', 'gtin', 'availability' ),