The focus of that release was the syntax parser, for which various bugfixes were fixed, especially:
- support of wiki syntax in links label
- better support of image caption
- better support of table caption
On the less visible side, the reasons why the major version was incremented are:
- the Bliki library which is the low lever MediaWiki syntax parser we are currently using is long dead, unfortunately. So it's been forked on https://github.com/xwiki-contrib/info.bliki.wikipedia_parser and that's where most low level syntax parsing related issues are going to be fixed from now on
- to prepare the potential implementation of a new syntax parser, either from scratch or based on another library, the extension identifier of the XWiki MediaWiki syntax parser changed from org.xwiki.contrib.mediawiki:mediawiki-syntax to org.xwiki.contrib.mediawiki:mediawiki-syntax-bliki
- to support some more recent addition to the XWiki Rendering API the minimum supported version of XWiki jumped from 8.4 to 11.10
You can see more details on MediaWiki.
