Add missing attributes to the Zone API responses

[AGS4NO]

This PR adds missing attributes of the Zone response:

• secondary, last_transferred_at, active to Zone struct

Belongs to https://github.com/dnsimple/dnsimple-external-integrations/issues/17

[AGS4NO]

cc @DXTimer

package `colored v2.1.0` cannot be built because it requires rustc 1.70 or newer, while the currently active rustc version is 1.65.0

Dependency colored is no longer supported on this version of Rust. We can either pin the colored dep back to an older version or bump our rust version. We have a note that the rust version is pinned due to support for deps that use let-else but tests are passing on 1.74.1 in my local and that version also supports the latest colored dep.

I am leaning towards pushing the rust version updates, any other concerns with bumping this up?

[DXTimer]

Thanks for flagging this up @AGS4NO. I have pinned the version for the moment as I am working on updating our CI to build against the stable and nightly versions. I am hesitant when it comes to increasing the MSRV due to dev dependencies only. Let's deal with this in a separate PR.