Add jackson_version as this is now required by bramble-core's
build.gradle.

Extend feature flags implementations in our modules and disable private
groups, forums and blogs in core.

This reverts commit a7d956d9.

See https://github.com/JetBrains/compose-jb/issues/1548

Nico authored 3 years ago and Sebastian committed 3 years ago

Until we properly sign the .jar file, those signatures just result in a
`SecurityException`, making the .jar file unable to run. I got this fix
by

* https://github.com/theapache64/stackzy/commit/9dc0f64d79de32786fa6250bdf4b28416ab38eee
* https://github.com/theapache64/stackzy/issues/41

Fixes #119.

Nico authored 3 years ago and Mikolai Gütschow committed 3 years ago

Due to native package distributions we need at least JDK 15.

Related to #31.