feat: Ember v4 Support, drop Ember < 3.24

[knownasilya]

Update addon to test against Ember v4, and drop support for Ember < 3.24.

Had to drop older versions due to ember-modiifer updates to support v4.

This resolves the following error:

Error: Invalid modifier manager compatibility specified
                at modifierCapabilities (http://localhost:7357/assets/vendor.js:37703:13)
                at http://localhost:7357/assets/vendor.js:61297:46
                at CustomModifierManager.getDelegateFor (http://localhost:7357/assets/vendor.js:37752:20)
                at CustomModifierManager.create (http://localhost:7357/assets/vendor.js:37768:27)
                at Object.evaluate (http://localhost:7357/assets/vendor.js:45058:25)
                at AppendOpcodes.evaluate (http://localhost:7357/assets/vendor.js:43638:19)
                at LowLevelVM.evaluateSyscall (http://localhost:7357/assets/vendor.js:47418:22)
                at LowLevelVM.evaluateInner (http://localhost:7357/assets/vendor.js:47374:14)
                at LowLevelVM.evaluateOuter (http://localhost:7357/assets/vendor.js:47366:14)
                at VM.next (http://localhost:7357/assets/vendor.js:48335:24)

[nickschot]

Looks good, thanks! 🙏