Arguments signature has changed. First arguments is now an options object of which
'config' can be a property. Previously 'config' itself was the first and only argument.
* New getCreator and getOldestRevision methods added to WikiPage class
+* (bug 4220) the XML dump format schema now have unique identity constraints
+ for page and revision identifiers. Patch by Elvis Stansvik.
=== Bug fixes in 1.20 ===
* (bug 30245) Use the correct way to construct a log page title.
* (bug 36537) Rename wfArrayToCGI to wfArrayToCgi for consistency with wfCgiToArray.
* (bug 25946) The message on the top of Special:RecentChanges is now displayed
in user language instead of content language
+* (bug 35264) Wrong type used for <ns> in export.xsd
=== API changes in 1.20 ===
* (bug 34316) Add ability to retrieve maximum upload size from MediaWiki API.