Mark sensitivity on a value. However, when the value is encoded to send to the
provider to produce a changeset we must remove the marks, so unmark the value
and remark it with the saved path afterwards
This brings in the new HCL extension functions "try", "can", and
"convert", along with the underlying HCL and cty infrastructure that allow
them to work.
The existing cty packages were already at the latest version, but we were
not yet vendoring the msgpack package.
This also imports some dependencies from:
github.com/vmihailenco/msgpack
Pam Selle