Update to 2019b

See http://mm.icann.org/pipermail/tz-announce/2019-July/000056.html

Update to 2019a

See https://www.iana.org/time-zones and http://mm.icann.org/pipermail/tz-announce/2019-March/000055.html

Update to 2018i

See https://github.com/eggert/tz/blob/master/NEWS

Update to 2018h

See https://github.com/eggert/tz/blob/master/NEWS

Update to 2018g

Morocco switches to permanent +01 on 2018-10-27.

New main version for Time4J-v5.0 or higher

Contains the tzdb-version 2018f.

Update to 2018e

North- and South-Korea have now the same time.

Update to 2018d

The negative dst-offset of Ireland winter has been kept.

Fix for Irish Standard Time in years 1968-1971

Still based on the same tzdb-version 2018b, but containing a fix for Ireland (Europe/Dublin).

Update to 2018b

Only change of data compared with v2018a is the newer leap second expiry date.