Updated eslint and test dependencies

[ijlee2]

Background

We use and maintain a fork of ember-table at work, and noticed that the pod structure is still used for components. Generally speaking, [email protected] removed pod support for components, so ember-table may end up becoming a blocker to developers who want to update Ember to v6.

I suspect that the ember-release scenario (i.e. 6.4.0) is currently passing, because the classic components make use of the layout key. Removing the pod structure now would help maintainers and contributors glimmerize these components (Glimmer + pod doesn't work) and introduce the v2 addon format.

What changed?

In this pull request, I updated eslint and test dependencies so that we can keep this project up-to-date. The actual unpodding is done in #1173.