AppVeyor CI builds fail due to spellcheck dependencies

[agitter]

The Appveyor build in greenelab/covid19-review#1214 failed with the error

E: The repository 'http://apt.postgresql.org/pub/repos/apt bionic-pgdg Release' no longer has a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
N: Skipping acquire of configured file 'contrib/binary-i386/Packages' as repository 'http://download.virtualbox.org/virtualbox/debian bionic InRelease' doesn't support architecture 'i386'

I believe that is related to https://www.postgresql.org/message-id/ZN4OigxPJA236qlg%40msg.df7cb.de

[dhimmel]

Possibly we could update the appveyor image to Ubuntu2204 at:

rootstock/.appveyor.yml

Line 23 in 078af3a

image: ubuntu

Or we could consider getting rid of appveyor entirely and possibly adding PR comments to the GitHub action via something like:

• https://github.com/mshick/add-pr-comment
• https://github.com/thollander/actions-comment-pull-request

[dhimmel]

Fixed by #509

Not against removing AppVeyor completely if we can replace with GH actions, but will close since the error is fixed.

[agitter]

Thanks for fixing this. I'm glad it wasn't too complicated.

I agree we could drop AppVeyor if either of us or a different contributor has time to look into those GitHub Actions alternatives in the future.