Upgrade firecracker to v0.22.4

[gaby]

This PR takes care of upgrading firecracker from v0.22.1 to v0.22.4

Review of firecracker changes:

v0.22.2

• Fixed inconsistency in YAML file InstanceInfo definition

v0.22.3

• Fixed off-by-one error in virtio-block descriptor address validation.

v0.22.4

• Fixed the reported used bytes for any virtio-block request.
• Fixed all virtio-block read/write operations to valid guest addresses
  with buffer length of 0 to result in no-op.

[darkowlzz]

Thanks for updating the firecracker version. The changes look good to me. Can you also update the installation docs to reflect this change? https://github.com/weaveworks/ignite/blob/master/docs/installation.md#ignite-cli - firecracker version in the output.
Also, maybe squash the commits if possible 🙂

[gaby]

@darkowlzz Done, I'm using Github Desktop app and it doesn't have an option for squashing commits. I know there's an option to do it here via the PR but i don't see it on this repo.

[darkowlzz]

@darkowlzz Done, I'm using Github Desktop app and it doesn't have an option for squashing commits. I know there's an option to do it here via the PR but i don't see it on this repo.

That's okay. np.

[stealthybox]

Thank you for all of this incredible work.
This is significant maintenance effort to track all the dependencies -- we really appreciate it.