Hi,
The latest stable version of odoo is 13, v14 is still under development and it is expected to release by this october. Here regarding the issue, as you have specified the module owner, so i assume it might be a third party module you have download/bought from odoo apps.
By saying update the odoo to latest version, the module owner might meen that to pull the latest source code of the odoo version you are using. Suppose if you have installed odoo13 by the end of the December 2019, after that day, there will be a lot of commits come into odoo13 source code, it might be some improvements or bug fixes etc, so he is asking you to update the odoo13 source code to its latest. If you have already configured odoo with Git, you can make a pull request to update the code.
Better you clarify with the module owner and continue.
Thanks