[base] BASE 3.20 has been released

[Nicklas N. <nic...@me...>]

Hello all,

We have released BASE 3.20 today. This is a new major release with
some new useful features for filtering in tables.

Also note that Java 17 or newer is now required to run BASE. We have also 
updated the Log4j to version 2. If custom settings have been made in 
"log4j.properties" they need to be migrated to the "log4j2.xml" file.

For a complete list of changes, see:
https://base.thep.lu.se/query?milestone=BASE+3.20&group=type&groupdesc=1

Upgrading follows the usual procedure:
https://base.thep.lu.se/chrome/site/latest/html/admin/installation.upgrade.html

As usual, the program can be downloaded from:
https://base.thep.lu.se/wiki/DownloadPage

/Nicklas