Remove jQuery requirement

[benmurden]

The default in Ember from 3.14 is to not include jQuery. Therefore, we can no longer expect it to be there for all users.

[DuBistKomisch]

seeing deprecations from this addon now as well:

vendor.js:60599 DEPRECATION: Using this.$() in a component has been deprecated, consider using this.element [deprecation id: ember-views.curly-components.jquery-element] See https://emberjs.com/deprecations/v3.x#toc_jquery-apis for more details.