1.4.3:

* update OpenCC and MediaWiki data
* fix OpenCC normalized characters

1.4.1: update tables and licensing

1.4.0: update conversion tables, remove zh-sg dict

Upstream ZhConversion.php removed zh-sg dictionary.
See <https://phabricator.wikimedia.org/T91620>
Users can provide their own via the `update` parameter.

version 1.2.0