Next version release date?

Hi,

more than a year ago, a memory leak was fixed in
https://sourceforge.net/p/libpng/code/ci/eb6767273a4eb5d6f4ad528370d7262cf7aa220c/

Unfortunately, there was no official release since, so the latest 
release still leaks. Can you already estimate when the next release will 
be? I'd like to update libpng in Qt.

Cheers,
Robert