def limit(value = nil, &block)
      chain { criteria.update_request_options size: block || Integer(value) }
    end
def limit(value = nil, &block)
      chain { criteria.update_request_options size: block || Integer(value) }
    end
Sets elasticsearch `size` search request param
 Default value is set in the elasticsearch and is 10.

 @example
  UsersIndex.filter{ name == 'Johny' }.limit(100)
     # => {body: {
            query: {...},
            size: 100
          }}