Restore publish settings to before sbt-ci-release (bp #1999) (#2000)

* Restore publish settings to before sbt-ci-release (#1999)

sbt-ci-release changes the commands required to publish to Sonatype.
While this may be a desirable change at some point, it is inconsistent
with other repos. Reverting for the time being.

(cherry picked from commit 594f783b

)

# Conflicts:
#	build.sbt

* Resolve merge conflicts

Co-authored-by: Jack Koenig <koenig@sifive.com>