What's new in Weka 3.8.3 and 3.9.3

These releases include a number of bug fixes and improvements. As usual, for a complete list of changes refer to the changelogs:

https://www.cs.waikato.ac.nz/~ml/weka/CHANGELOG-3-8-3

https://www.cs.waikato.ac.nz/~ml/weka/CHANGELOG_PACKAGES-3-8-3