[wp-trac] [WordPress Trac] #35300: Clean up emoji compatibility code

[WordPress Trac]

#35300: Clean up emoji compatibility code
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 Reporter:  pento           |      Owner:
     Type:  task (blessed)  |     Status:  new
 Priority:  normal          |  Milestone:  4.5
Component:  General         |    Version:
 Severity:  normal          |   Keywords:  emoji
  Focuses:                  |
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 The code in `wp-emoji-loader.js` is fairly messy, and it's kind of
 annoying to have to remember to update several places when a new test is
 added (for example, we'll need a new test when Unicode 9 lands later in
 the year).

 Let's make it easier to read, and fix how `wp-emoji.js` uses the
 `settings.supports` object, so that we don't have to keep updating it.

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Ticket URL: <https://core.trac.wordpress.org/ticket/35300>
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