time/ruby-tzinfo: update to 2.0.1

Update ruby-tzinfo to 2.0.1.

2.0.1 (2019-12-24)

* Fixed "SecurityError: Insecure operation - require" exceptions when loading
  data with recent Ruby releases in safe mode. #100.
* Fixed warnings when running on Ruby 2.7. #109.
* Add a TZInfo::Timezone#=~ method that performs a regex match on the time
  zone identifier. #99.
* Add a TZInfo::Country#=~ method that performs a regex match on the country
  code.

(taca)