Update dependency ember-power-select to v4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
ember-power-select (source)	devDependencies	major	2.3.5 -> 4.0.0

---

Release Notes

cibernox/ember-power-select

v4.0.0

Compare Source

• [BUGFIX] Multiple selects can receive an ember-data collection in the @selected attribute.

v3.0.6

Compare Source

v3.0.5

Compare Source

v3.0.4

Compare Source

• [BUGFIX] Allow to customize calculatePosition by extending from PowerSelect.
• [BUGFIX] Fix default values for triggerComponent and buildSelection in <PowerSelectMultiple>

v3.0.3

Compare Source

• [BUGFIX] Allow @triggerRole to be used to remove completely the role of the trigger by passing false/null

v3.0.2

Compare Source

• [BUGFIX] Put @ember-decorators/component in dependencies.

v3.0.1

Compare Source

• [BUGFIX] Fix bug in <PowerSelectMultiple> that caused it to render the search term in both the
  trigger and the before options component.

v3.0.0

Compare Source

• [CHORE] Update to Ember Basic Dropdown 2.0 final.

---

Renovate configuration

📅 Schedule: At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻️ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR has been generated by WhiteSource Renovate. View repository job log here.