no issue
Since `ember-moment@10.0` it's not been necessary to use the `ember-cli-moment-shim` package, with `moment` instead being usable directly via `ember-auto-import`. Getting rid of the shim package is necessary for compatibility with `embroider`, Ember's new build tooling.
- dropped `ember-cli-moment-shim` dependency
- added `moment-timezone` dependency and updated all imports to reflect the different package
- worked around `ember-power-calendar` having `ember-cli-moment-shim` as a sub-dependency
- added empty in-repo-addon `ember-power-calendar-moment` to avoid `ember-power-calendar` complaining about a missing package
- added `ember-power-calendar-utils` in-repo-addon that is a copy of `ember-power-calendar-moment` but without the build-time renaming of the tree for better compatibility with embroider
no issue
- members having multiple subscriptions is not really expected but if it does happen then the most recently updated subscription is most likely to be the one that we're interested in showing the details of in the members table
- added `{{most-recently-updated arr}}` helper+function that will return the item in the array argument with the most recent "updated at" value
- uses `updatedAtUTC` or `updatedAt` or `updated_at` values so it will work against any of our models or un-transformed API response objects
- updated `<GhMembersListItemColumn>` to use a `mostRecentSubscription` getter when showing subscription data rather than assuming the first object in the subscriptions array should be displayed
