Proposal: Ember Table 6

Its that time again! Building on https://github.com/html-next/vertical-collection/issues/400, I propose a new major version of Ember Table.

• Support Ember 3.28+ https://github.com/Addepar/ember-table/pull/1183
• Support Node 16+
• Require vertical-collection v5 https://github.com/html-next/vertical-collection/issues/400
• Refactor Ember Components to Glimmer Components https://github.com/Addepar/ember-table/tree/master/addon/components (if apps inherit and extend from these, that may be a challenge and make this not worth doing)
• Change various calculations which rely on browser APIs that were presumed to return accurate values, but actually return rounded integers. This improves scaling calculation stability & accuracy in positioned items. -> https://github.com/Addepar/ember-table/pull/948
• Remove scss from the demo app / docs site. As at https://github.com/Addepar/ember-table/blob/master/app/styles/ember-table/default.scss. This would remove ember-cli-sass as a dev dep, and address some edge case issues that may occur per https://github.com/Addepar/ember-table/issues/973
• Migrate to Volta (was already done)
• Embroider safe https://github.com/Addepar/ember-table/pull/1157
• All PRs for 6.0 should target master and use the 6.0 label. See https://github.com/Addepar/ember-table/pulls?q=is%3Apr+sort%3Aupdated-desc+label%3A6.0+

What else?

Start by reviewing the unchecked items in the proposal and the linked vertical-collection issue and pull requests. Inspect addon/components and app/styles/ember-table/default.scss for the component and SCSS migration scope. Done means the remaining Ember Table 6 requirements are resolved, with 6.0 work targeting master and using the 6.0 label.