Not strictly an upgrade, but adds a new mongodb-4_2 target with the
current mongodb from that branch.
Use matching client and server versions in mongodb tests- tests were
using the mongo 3.4 client to connect, and this finally doesn't work
with server 4.2.
Per reviewer suggestion, adding myself as cheetah3 maintainer.
Additionally, reestore comments describing the purpose of the
build-dependencies patch
fix: Adding libtool to allow darwin compiles
Libtool seems to be required for mongodb to compile on darwin.
fix: Marking MongoDB as broken on aarch64
fix: Adding libtools to the pkg imports
Update mongodb to 4.0.4