Update QEMU and jsoncpp

[ricab]

These two submodules escaped our recent effort to update 3rd-party dependencies.

[Ahmedkhalifa1999]

Is this issue open for public contribution? I want to try my hands at it to learn more about the codebase if that's possible.
However, I need some guidance on the details, and where to find developer documentation.

[ricab]

Hi @Ahmedkhalifa1999, thank you for your interest! I am afraid this is not the best issue for community contributions because it involves internal components that are not publicly available (yet). Perhaps there's something else that you would find interesting?

[Ahmedkhalifa1999]

Hello @ricab, not problem at all! I will keep following the issues and see if I find something interesting. On a side note, is there any available documentation for the code other than the README file?

[ricab]

Not for the time being, I am afraid, but we actually have it planned to settle on a contributing.md soon.