MobilityDB 1.2.0 - New upstream version

Hi All,

MobilityDB has released 1.2.0 and I have pushed a commit to Salsa to
update the Debian package. I've run a build on PGDG and there was a
failure on bullseye arm64 but this was caused by a network timeout when
downloading one of the dependencies.

I'd like to request a review and upload, as cycles permit.

Let me know if anything needs changes.

Thanks,

-- Bradford