This package is managed upsteam in Arch.
$ pacman -Qi pycharm-community-edition
Name : pycharm-community-edition
Version : 2018.1-1
Description : Python IDE for Professional Developers
Architecture : x86_64
Packager : Maxime Gauduin <firstname.lastname@example.org>
Build Date : Fri 30 Mar 2018 05:40:41 AEDT
This was flagged as out of date on 2017-04-17 ...
Not sure if there is an escalation process, but other users are probably waiting for it too.
Once in Arch stable it will follow the usual migration path through Manjaro unstable, testing and stable branches.