Bump to version 0.9.0

Release primarily to support Raspberry Pi Model B and MilkV Mars.

Bump to version 0.8.0

Prepare to release updated platforms and dedicated installer support.

Bump to version 0.7.0

Bump to version 0.6.0

updater: Update zfs userland along with kernel

Avoid situation where more up-to-date kernel modules are present than
the userland which may be in dracut causing boot issues.

updater: Force dracut run

Ignore failure to update portage and proceed to try updating world. Add
the `force_kernel_install` fact to the kernel build run to force
initramfs creation to pull in, for example, updated ZFS modules, even if
the kernel sources, controlled by the `build=kernel` fact, are not
updated. Bump version to 0.5.9.

Closes #24

installer: Accept raspberrypi(3|4) platforms

Bump version to 0.5.8.

installer: Add vmware platform support

Bump version to 0.5.7.

Add missing rockpro64 installer class

Bump release to 0.5.6.

Bump version to 0.5.5