CanJS 6 version errors

[cherifGsoul]

The changes for CanJS 6 is not working like in the following screenshot:

Even with a component node selected in the left panel, nothing is displayed in the Observable Properties Editor and the console has errors.

The error is in this line: https://github.com/canjs/devtools/blob/4bcf0d6f610bb3c9d6ed409de7f793785c606e3c/panel/panel.mjs#L303

Maybe we should update panel component properties, viewModelData properties to have default value as new ObservableObject and breakpoints to have new ObservableArray as default value.

• [ ] Use canReflect
• [ ] Fix Expandable Panel content, use template customization instead of <content/>
• [ ] Fix Type errors, most of errors can be fixed by setting a default value

[justinbmeyer]

Why are we assuming updateDeep instead of using canReflect?