v4.30.0

MixedModels v4.30.0

NEWS file.
Diff since v4.29.1

NB: Closed issues and pull requests are sorted temporally and so may
include backports to other versions or work in the development branch for
an upcoming breaking release. Please see the NEWS file
for changes sorted by release.
Closed issues:

• Additional details in documentation for Grouping() (#538)
• Remove repeated initial entry in fitlog (#619)
• Refactor NLopt boilerplate into an easy function call (#689)
• Switch to PRIMA.bobyqa for optimization? (#742)

Merged pull requests:

• refactor optimization to make it easy to add new backends (#802) (@palday)