Add SNAPSHOT publishing of kiwix-lib on Nightly builds

[macgills]

To enable the rapid testing of the latest code in kiwix-lib we want to publish to artifactory nightly.

I was following this article on how to do it for gradle.

The end result is that the android project can switch from
implementation 'org.kiwix.kiwixlib:kiwixlib:<CURRENT_VERSION>'
to
implementation 'org.kiwix.kiwixlib:kiwixlib:<NEXT_VERSION>-SNAPSHOT'
at will

[kelson42]

I think we should do so and publish automatically via CA our git master HEAD to bintray to a dev snapshot. I would keep only one name/tag for that version an don't keep any history of it. This would not e a solution to the #346 problem, but would allow people to use cutting-edge version of the libkiwix withough having to compile it.

[kelson42]

@mgautierfr Should such a dev version based on master be uploaded to bintray by kiwix-build or directly from kiwixlib repo?

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be now be reviewed manually. Thank you for your contributions.

[kelson42]

@mgautierfr AFAIK, we publish both libzim anf libkiwix binaries meanwhile in nightlies. Same will happen with java-libkiwix once its over.