Hi,

debian/maven.rules pins jackson-annotations to 2.14.0, so jbibtex does not
build with any other version. With jackson-annotations 2.21:

  [ERROR] dependency: com.fasterxml.jackson.core:jackson-annotations:jar:2.14.0 (provided)

It still builds today, but this becomes serious once 2.21 is uploaded.

Mapping it to 2.x fixes it. jbibtex then builds and its tests pass with
both 2.14.0 and 2.21:
MR_JBIBTEX

Thanks,
Juan