Bump Haskell CI (fork) to latest GHC versions

[andreasabel]

• Bump Haskell CI to latest minor GHC versions

[MatthewDaggitt]

Thanks for porting it across! Apart from the one comment below, I think this looks good. @gallais any thoughts as you put most of the CI together?

[MatthewDaggitt]

My fork uses the ubuntu-20.04 image rather than the ubuntu-18.04 image which allows it to use the latest version of action/checkout.

And why do we need the latest version of action/checkout?

Not needed.
But you might get harassed by dependabot if you don't use it...

As discussed in the previous PR, unless there is a really convincing reason, I would really be happier continuing to use the main repo. In particular, we don't use dependabot yet, so I think the point is moot.

Any chance you could revert this change?

[andreasabel]

I have created this workflow and I am maintaining it (inspect the history). Is there a problem if I maintain it my way?

If you must,

• please install https://github.com/haskell-CI/haskell-ci
• type haskell-ci regenerate
• undo the changes it does to the triggers (on section in the haskell-ci.yml file); can be easily done using git tooling like magit or whatever
• amend the commit

[andreasabel]

I did that in a parallel PR, so choose whatever you like better:

• Bump Haskell CI (original!) to latest minor GHC versions #2187

[gallais]

I'm more familiar with the ci-ubuntu than the haskell-ci. No opinion on my end here.

[andreasabel]

Merge this or

• Bump Haskell CI (original!) to latest minor GHC versions #2187