Required files
ruby-progressbar/output
ruby-progressbar/outputs/tty
ruby-progressbar/outputs/non_tty
ruby-progressbar/timer
ruby-progressbar/progress
ruby-progressbar/throttle
ruby-progressbar/calculators/length
ruby-progressbar/calculators/running_average
ruby-progressbar/components
ruby-progressbar/format
ruby-progressbar/base
ruby-progressbar/refinements