F-Droid fails to build

[licaon-kter]

Ref https://f-droid.org/wiki/page/io.gresse.hugo.anecdote/lastbuild_27

[HugoGresse]

I've created a new tag to see if this works. If not I'll need to setup the fdroid server localy to build it as they are doing.

[linsui]

objectbox/objectbox-java#560 The objectbox-gradle-plugin is not open source.