CompatHelper: bump compat for EnzymeCore to 0.8 for package test, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the EnzymeCore package from 0.6, 0.7 to 0.6, 0.7, 0.8 for package test.
This keeps the compat entries for earlier versions.

Note: I have not tested your package with this new compat entry.
It is your responsibility to make sure that your package tests pass before you merge this pull request.

[yebai]

@penelopeysm, is there any way you can safely permit CI on these automatically created PRs?

[penelopeysm]

No, not really – we'd have to create a personal access token and add it to the CompatHelper workflow, which I think is not really safe.

Other places I've seen that do this use a GitHub app (such as Dependabot) to manage this, which works because the app has its own token that can be used to trigger workflows.

[yebai]

Can you ask the Julia community to see the standard method for addressing this? If we can't find a better solution, then feel free to add a personal access token to CompatHelper.

[penelopeysm]

JuliaRegistries/CompatHelper.jl#500 suggests the current workaround is to close and reopen the PR... let's see

add a personal access token to CompatHelper

It'd be a token associated with my account, and it would mean that anybody in the organisation can use it, though. We'd need to find a volunteer brave enough to provide the token but that's not me :)

[penelopeysm]

It's weird that setting the ssh key in COMPATHELPER_PRIV doesn't work. Documenter also uses an ssh key and it works well enough. I think this is an upstream bug.