Add versionScheme (PVP) to SBT publish settings (backport #2871) (#2874)

* Add versionScheme (PVP) to SBT publish settings (#2871)

This allows build tools to warn users about possible binary
incompatibility issues when using dependencies that depend on
mutually incompatible versions of Chisel.

(cherry picked from commit 9f080d51

)

# Conflicts:
#	build.sbt

* Resolve backport conflicts

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