When will Geany 0.21 be in the repos, instead of Geany 0.20? Whose responsability is it, Ubuntu or Geany?
I wasn't sure of where I could get packages information, so I just used Askubuntu.
After the release of an Ubuntu version packages are only updated for security and big fixes. No further release is done for individual packages.
If you want to keep Geany up to date you need to add a PPA. Luckily Geany keeps a developers PPA that has the version you are looking for.
Install it by using these commands on a terminal