2.40.0 * Fix id comparision in tests so that they work with mongodb object id (Raymond Feng) * Update validations.js (Rand McKinney) * Add support for using UUID V4 as defaultFn (Bram Borggreve) * primaryKey for hasMany and belongsTo relations (sklyukin) * primaryKey to hasOne relation (sklyukin) * Add direct copmarison value for array matching (Laurent Villeneuve) * Add support for matching array values à la mongo. (Laurent Villeneuve) * Fixed ReferencesMany .findById to check the given id in the ids array of the model instance (Satyadeep)