Merge branch 'python-38-back' into 'master'

Re-enables python-3.8 builds

See merge request !469
2 jobs for master in 30 minutes and 52 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #222789
docker
build_linux

00:30:13

passed #222790
intel macos
build_macos_intel

00:30:48