Hello,
I have upgraded Doxygen on the CI infrastructure this morning to 1.8.19.
Most repositories used 1.8.18.
MediaWiki extensions were still using 1.8.16 due to a crash occurring when processing Wikibase [T254465].
Changelog is available at: https://www.doxygen.nl/manual/changelog.html#log_1_8_19
[T254465] https://phabricator.wikimedia.org/T254465
wikitech-l@lists.wikimedia.org