Empty hash for config.hours about biz HOT 2 CLOSED

irb(main):004:0> s = Biz::Schedule.new do |config|
irb(main):005:1* config.hours = {mon: {'00:00' => '00:00'}}
irb(main):006:1> end
=> #<Biz::Schedule:0x007ff8805d3808 @configuration=#<Biz::Configuration:0x007ff8805d37b8 @raw=#<struct Biz::Configuration::Raw hours={:mon=>{"00:00"=>"00:00"}}, holidays=[], time_zone="Etc/UTC">>>
irb(main):007:0> s.periods.after(Time.now).timeline.until(Time.now + 7.days).to_a
=> []