[MacPorts] #58353: icu @58.2_2: update to 58.3

[MacPorts]

#58353: icu @58.2_2: update to 58.3
--------------------+------------------------
 Reporter:  l2dy    |      Owner:  ryandesign
     Type:  update  |     Status:  assigned
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:
 Keywords:          |       Port:  icu
--------------------+------------------------
 https://github.com/unicode-org/icu/releases/tag/release-58-3

 > This is a maintenance release of ICU. This update does not include any
 API changes.
 >
 > - New Japanese era Reiwa (令和) support
 > - IANA tzdata2019a

-- 
Ticket URL: <https://trac.macports.org/ticket/58353>
MacPorts <https://www.macports.org/>
Ports system for macOS