Our work over June has brought a few new updates for July including lots of Xfce 4.13 updates, bug fixes, and a few migrations which round out a nice month of development. Xfce has a fairly standard versioning scheme. Even version numbers (4.10, 4.12, 4.14) represent stable, supported releases….

Source: https://bluesabre.org/2018/07/01/xubuntu-development-update-july-2018/