1. Set $version to final in Makefile (drop the "dev" suffix)
  2. Set date and final $version in
  3. Commit
  4. Tag $version
  5. Publish to PGXN (make dist and upload to
  6. if $version ends in 0, then: branch release-$major.$minor
  7. Set new target version (in both master and release branch if any)
  8. Push commits, tags and branches (if any made)