Add the latest Docker images to the CI.

[ppedrot]

No description provided.

[ppedrot]

I'm clearly no fullstack dev.

[ppedrot]

For some reason, 8.19 and 8.20 take more than one hour to succeed, but this does not seem related to this patch. Rather, we're just compiling a bunch of reverse deps that are not there in the other runs.

[Lysxia]

ping @liyishuai @gmalecha who has the permissions for this?

[Zimmi48]

The reason why it is testing reverse deps is because of this line in the meta.yml file:

coq-ext-lib/meta.yml

Line 9 in b27e806

ci_test_dependants: true

No idea why this happens only for Coq 8.20.

[SkySkimmer]

No idea why this happens only for Coq 8.20.

It's not that it doesn't happen for 9.0 and dev, it's that certicoq has no package compatible with them so only gets tested (and brings in its metacoq dep) on 8.19 and 8.20.