Fixed issue#41 and issue#42
Fixed issue#41 and issue#42

For fixing issue#41 Access level to duxet\Rethinkdb\Query\Builder::$operators must be public (as in class Illuminate\Database\Query\Builder)
change protected $operators to public $operator line #32

and for fixing issue #42 Declaration of duxet\Rethinkdb\Query\Builder::groupBy() should be compatible with Illuminate\Database\Query\Builder::groupBy(...$groups)
change line #442 public function groupBy() to public function groupBy(...$groups)
duxet/laravel-rethinkdb