1.6.3

What's Changed

• tests: check for device node presence in get_root_lv() by @bmr-cymru in #37
• Fix boot with --no-fstab and systemd-v255 and later by @bmr-cymru in #40
• boom: bump release to 1.6.3 by @bmr-cymru in #43

Full Changelog: 1.6.2...1.6.3