add Asciicast to regression tests

[ericphanson]

Based on https://github.com/SciML/SciMLBase.jl/blob/master/.github/workflows/Downstream.yml

Briefly discussed a few years ago here: #1675 (comment)

I've only added my new Asciicast.jl so far, but I imagine we could add all the documenter plugins, if there is interest

[odow]

See https://github.com/JuliaDocs/Documenter.jl/blob/master/.github/workflows/regression-tests.yml

[odow]

I feel like this just encourages people to make breaking changes 😢

[ericphanson]

eh, I think you need something like this if you're going to put the workflow on 20+ repos, like SciML does (where I copied it from). Because it also could be some unrelated dependency has made a breaking change, and the package being tested has updated for it, but one of the regressionees has not, and then you can't resolve, so you can get failing CI unrelated to either package making a breaking release. (Although the comment is not focusing on that case, I suspect it can be common).

Agreed it's probably not necessary here though

[ericphanson]

Oops, missed that! Ok, I updated this PR to just add Asciicast there

[ericphanson]

do we only want workflow-dispatch for regression-tests.yml? That seems OK if we remember to run it, but otherwise we could add it to just run every time

[odow]

I think we should at least attempt to be mindful of CI resources. I'm not overly fond of running the tests of a bunch of unrelated packages every time we fix a typo in Documenter.

And if you're touching internals, Documenter is under no obligation to ensure you don't break. In general, I use the workflow-dispatch in JuMP and MOI quite liberally for anything that seems like it might cause issues. Here's the most recent: jump-dev/MathOptInterface.jl#2359 (comment).

We also talked about adding a TODO item to the release checklist:
https://github.com/JuliaDocs/Documenter.jl/blob/master/docs/src/checklists.md#making-a-release

[mortenpi]

I'd say let's stick to running this manually. Those tests are informational and not strictly part of the Documenter test suite.

We also talked about adding a TODO item to the release checklist

I thought we already did, apparently not. We definitely should.

[ericphanson]

bump

[mortenpi]

Thank you!