Log Message:
time/ruby-tzinfo: update to 2.0.4

## Version 2.0.4 - 16-Dec-2020

* Fixed an incorrect InvalidTimezoneIdentifier exception raised when loading a
  zoneinfo file that includes rules specifying an additional transition to the
  final defined offset (for example, Africa/Casablanca in version 2018e of the
  Time Zone Database). #123.