[Pkg-rust-maintainers] Bug#1049388: rust-rusqlite: Please upgrade to v0.29

[Peter Green]

> Please upgrade to (or separately provide) newer upstream branch v0.29.

Preliminary analysis looks pretty good in general, but parsec-service
has some issues with it's migration to testing that need to be sorted
before going ahead with this in unstable. I've just made some uploads
that will hopefully sort them, but may need to wait a while to see if
they have worked due to the mips64el buildd issues.

One of the rdeps "settle" is yours, i've done a test build and it
seems to build fine after updating the dependency. Ive uploaded the
new rusqlite to experimenta. Feel free to do any further testing.