Log Message:
time/ruby-tzinfo1: update to 1.2.8

1.2.8 (2020-11-08)

* Added support for handling "slim" format zoneinfo files that are produced
  by default by zic version 2020b and later.  The POSIX-style TZ string is
  now used calculate DST transition times after the final defined transition
  in the file.  The 64-bit section is now always used regardless of whether
  Time has support for 64-bit times.  #120.

* Rubinius is no longer supported.