Claim ownership of the mojo snap

Hi.

The current owner of the mojo snap has left the company, and this snap should change ownership to someone else in the maintainers team (https://launchpad.net/~mojo-maintainers). Me, mthaddon or ~canonical-is would all be suitable. Its probably not in a state for ~canonical and official support.

I will reach out to the current owner and confirm the desire to transfer.

Current owner’s email is bouncing, but since this was developed in Canonical, and the desired owner is also in Canonical, I have transferred ownership to @stub