Required files
tzinfo/ruby_core_support
tzinfo/offset_rationals
tzinfo/time_or_datetime
tzinfo/timezone_definition
tzinfo/timezone_offset_info
tzinfo/timezone_transition_info
tzinfo/timezone_index_definition
tzinfo/timezone_info
tzinfo/data_timezone_info
tzinfo/linked_timezone_info
tzinfo/timezone_period
tzinfo/timezone
tzinfo/info_timezone
tzinfo/data_timezone
tzinfo/linked_timezone
tzinfo/timezone_proxy
tzinfo/country_index_definition
tzinfo/country_info
tzinfo/country
tzinfo/country_timezone