Version bump to v0.9.0

 - Knowingly ignoring an irregularity in Python building
 - For details, see pipeline https://gitlab.com/arpa2/kip/-/jobs/957955273
1 job for v0.9.0 in 4 minutes and 25 seconds (queued for 2 seconds)
latest
Status Job ID Name Coverage
  Build
passed #957979648
mkhere

00:04:25