[Koha] New Koha minor versions released - security fixes included, UPGRADE!

[Jonathan Druart]

Hello everybody,

I am announcing, on behalf of the whole Koha release team,
synchronised releases for the four release versions we are currently
supporting.

The release notes are available below:
21.05.04 - https://koha-community.org/koha-21-05-04-released-%e2%9a%a0-security-release/
20.11.10 - https://koha-community.org/koha-20-11-10-released-%e2%9a%a0-security-release/
20.05.16 - https://koha-community.org/koha-20-05-16-released-%e2%9a%a0-security-release/
19.11.22 - https://koha-community.org/koha-19-11-22-released-%e2%9a%a0-security-release/

As they contain security bug fixes we suggest you upgrade all the Koha
instances you are in charge of as soon as possible.

Let us know if you have any questions.

Regards,
Jonathan