[Koha] Koha 3.18.13 Released

The Koha team is pleased to announce the happy holiday release of Koha 3.18.13. Please refrain from putting down your holiday beverage of choice to install this version, it will be waiting for you when you get back from your time away. :) As always, the release notes are available at https://koha-community.org/release-notes-for-koha-3-18-13/ Have a very jolly holiday period, stay safe, and we'll see you all back in the new year, when I know you are all going to be refreshed and ready to contribute patches, signoffs, opinions, and good humour to the Koha community. Liz