Errors on Stdlib packages

[rossviljoen]

CompatHelper currently errors on many Stdlib packages. For example, in the actions of this repo:

┌ Error: The dependency was not found in any of the registries
│   dep.package.name = "Dates"
│   dep = CompatHelper.DepInfo(CompatHelper.Package("Dates", UUID("ade2ca70-3891-5945-98fb-dc099432e06a")), nothing, VersionSpec("1"), "1")
└ @ CompatHelper ~/.julia/packages/CompatHelper/2q0Gp/src/utilities/new_versions.jl:198

https://github.com/JuliaRegistries/CompatHelper.jl/actions/runs/10712142909/job/29702058646

[rossviljoen]

cc @DilumAluthge

[ValentinKaisermayer]

Seeing that too.

[DilumAluthge]

CompatHelper looks in the registries to get the versions of packages. So this likely needs to be fixed in the General registry (by registering those stdlibs in the General registry).