Steps required are:

• Bump release version (in cmake and spec files). git commit -m "Release of x.x.x"
• Merge to master
• Create signed release tag: git tag -u $EMAIL -s vx.x.x -m "Release of x.x.x"
• Upload release tarball: ftp://upload.kde.org/README
• Create sysadmin tickets to move release tarballs to the desired location (include sha256)
• Blog about release
• Announce release on kde-apps-announce and pim mailinglist

We will need to release:

• kimap2
• sink
• kube

See also: https://techbase.kde.org/ReleasingExtragearSoftware

Tarballs are created and uploaded like this (sha256 for sysadmins):

$ git archive --format=tar.xz --prefix=kasync-0.1.0/ v0.1.0 > kasync-0.1.0.tar.xz
$ sha256sum kasync-0.1.0.tar.xz
    7cc451662fcf5c2f67cbebdeb03020  kasync-0.1.0.tar.xz
$ curl -T kasync-0.1.0.tar.xz ftp://upload.kde.org/incoming/