Upgrade Supporting Software

[svogt0511]

This includes upgrading to use node.js 20 and upgrading global ember-cli to the latest version. This usually goes pretty quickly because ember tries to stay compatible with quite a range of node versions.

It turns out that Vercel support is max'ed out at node v20 and the Ember v5 compatibility matrix lists node 20 as compatible, so we will use node v20.

See the Upgrade Supporting Software in the Technical Spec.

• Upgrade to Node.js 20. This includes making sure that vercel builds with node 20. The github workflows use node 20. Finally specify package.json 'engine' as node 22.
• Upgrade global development ember-cli to the latest version.

See Implementation Notes.