2.31.0 * Assert the existence of instance (Raymond Feng) * Make sure operator/options are honored (Raymond Feng) * Fix coercion from ObjectID to String (Raymond Feng) * Fix #623 - use actual id order (Fabien Franzen) * test: fix persistence-hooks failures in MySQL (Miroslav Bajtoš) * Includes with transaction support (Rus1) * Fix updateOrCreate transaction propagation (Rus1) * Fix promise chaining in case of error (Rus1) * Promisify 'autoupdate' (Pradnya Baviskar) * Add new hook 'loaded' (Pradnya Baviskar)