Add support for ember-component-attributes addon

[Turbo87]

Before:

  {{#link-to "categories" (html-attributes aria-label="Categories")}}{{svg-jar "crate"}}{{/link-to}}

After:

  <LinkTo @route="categories" @model={{html-attributes}}>{{svg-jar "crate"}}</LinkTo>

[tylerturdenpants]

Eww. This one looks yucky @Turbo87

[Turbo87]

this one is from https://github.com/mmun/ember-component-attributes btw

and I'm starting to wonder if it's really worth it to support it vs. listing it as a caveat in the README

[tylerturdenpants]

@Turbo87 I'm working on a fix. Does this transform look correct? I will continue for all other invocations soon.

Before:

  {{#link-to "categories" (html-attributes id="main-bar" class="large" data-foo="123")}}
    {{svg-jar "crate"}}
  {{/link-to}}

After:

  <LinkTo @route="categories" id="main-bar" class="large" data-foo="123">
    {{svg-jar "crate"}}
  </LinkTo>

[Turbo87]

LGTM