Unrevert #34347 and bump Pkg to a version that is compatible with it

[KristofferC]

Fixes #34317

[DilumAluthge]

Would be great to get a PkgEval on this, right?

@maleadt

[KristofferC]

Not really. Why? I tested that Pkg.test isn't broken here.

[maleadt]

No need to run all the tests though, as this broke all packages:
@nanosoldier runtests(["Example"], vs = ":master")

[JeffBezanson]

We could make this more backwards compatible by keeping have_color as a boolean with roughly the meaning it had before, and using a new name for the 3-valued variable we use internally.

[KristofferC]

@nanosoldier runtests(["Example"], vs = ":master")

[nanosoldier]

Your package evaluation job has completed - no new issues were detected. A full report can be found here. cc @maleadt

[KristofferC]

We could make this more backwards compatible by keeping have_color as a boolean with roughly the meaning it had before, and using a new name for the 3-valued variable we use internally.

Let's get his back in since quite a lot of time was spent on reviewing and fixing up the original PR and then we can add the extra backwards compat later if we think it is needed (perhaps from a full PkgEval at some point).