MediaWiki upgrade?

The MediaWiki package in the one-click install has some known security issues that are fixed in version 1.19.3: Bug 40995,
Bug 41400,
Bug 39700,
Bug 39823,
Bug 39184,
Bug 39180,
Bug 37587,
Bug 39824.

Who maintains the MediaWiki 1-click-install system? Can the sites created with 1-click-installs be automatically upgraded through the system?