Create a modifier version - Part 2 - more streamlined

[cah-brian-gantzler]

Provides for a more streamlined version of the modifier

<ol {{sortable-group onChange=this.update a11yAnnouncementConfig=this.myA11yConfig}}>
  {{#each model.items as |item|}}
    <li {{sortable-item model=item}}>
      {{item.name}}
      <span class="handle" {{sortable-handle}}>&varr;</span>
    </li>
  {{/each}}
</ol>

This implements the purposed issue #342

[st-h]

@cah-briangantzler Is there anything I can help you with here? Just wanted to add this Addon to my app, but noticed it's either refactoring quite a bit of my markup, or making modifiers available.

[cah-brian-gantzler]

As far as Im concerned this is completed. Just waiting on them to approve. The modifier version is only back to 3.8, the component version is back farther. I updated the travis to no longer test the older versions.

The tests are failing on the beta and canary (Both component and modifier), I dont know if thats a blocker to releasing this.

If you were refactoring anyway, and on 3.8+ the modifier is definitely the way to go. Gives you more flexibility. We use ember-yeti-table and wanted to make the rows use this addon. We cant with the component version, but can apply the modifiers to the yeti-table component that represents the tr.

[cah-brian-gantzler]

Im not sure whats causing the 'no environment variable set' job to be created thats failing. All the tests pass except beta and canary. The travis is set to allow canary to fail, but not beta

[ygongdev]

The beta and canary tests are also failing on master, so I'm thinking something is going on with 3.17+, but I'm ok as long as 3.15 is fine.

[chriskrycho]

👏 thanks for driving this, @cah-briangantzler!