Use node20

[porras]

Hi!

Currently this actions shows a warning about the node version:

Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: conao3/setup-cask@master. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.

I'm not familiar with the code of this action so maybe this change is too simplistic, but what I can say is that I pointed a package I maintain to my fork and it worked fine (and the warning is no longer there): https://github.com/porras/evil-ruby-text-objects/actions/runs/8646977431

[jcs090218]

Thanks for the changes!

cc @conao3

[conao3]

yes, I think this change is reasonable.
I worried about regression happening, though.
I'll have to add tests. Well, I'll merge them once.

[conao3]

Good catch, thanks!