Embroider addon compatibility

This issue tracks embroider compatibility across the top section of addons in the community with the goal of getting help from others to improve embroiders compatibility. We have created test helpers that can be added to addons to validate that they work in embroider in both safe and optimized variants via ember-try scenarios. Below is a list of the top 25 addons (according to emberobserver.com) and their current state. If you are able to work on adding @embroider/test-setup (instructions can be found here) please reference this issue so I can keep this list updated.

• ember-test-helpers https://github.com/emberjs/ember-test-helpers/pull/989 (only tests embroider-safe ATM)
• ember-test-waiters https://github.com/emberjs/ember-test-waiters/issues/303
• ember-cli
• ember-resolver
• ember-qunit
• ember-concurrency
• ember-test-selectors https://github.com/simplabs/ember-test-selectors/pull/670
• ember-cli-mirage https://github.com/miragejs/ember-cli-mirage/pull/2184
• ember-basic-dropdown https://github.com/cibernox/ember-basic-dropdown/pull/613
• ember-power-select
• ember-cli-string-helpers
• ember-cli-code-coverage https://github.com/kategengler/ember-cli-code-coverage/pull/327
• ember-svg-jar
• ember-in-viewport
• ember-angle-bracket-invocation-polyfill
• ember-cli-postcss (not needed, using postcss-loader would make more sense instead of a dedicated Ember addon)
• ember-modal-dialog https://github.com/yapplabs/ember-modal-dialog/pull/370
• ember-changeset
• ember-power-calendar
• ember-tooltips
• ember-sortable https://github.com/adopted-ember-addons/ember-sortable/pull/469
• ember-cp-validations
• ember-changeset-validations
• ember-math-helpers
• ember-cli-flash https://github.com/poteto/ember-cli-flash/pull/360
• ember-lifeline
• ember-infinity https://github.com/ember-infinity/ember-infinity/pull/451
• ember-engines
• ember-cli-eyeglass

[bertdeblock]

@NullVoxPopuli I’ve updated the list as best as I could, please let me know if anything else should be checked off.

[bertdeblock]

Is this issue still needed / relevant?