[wp-trac] [WordPress Trac] #31823: Add ESLint integration

[WordPress Trac]

#31823: Add ESLint integration
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 Reporter:  westonruter       |       Owner:  netweb
     Type:  task (blessed)    |      Status:  accepted
 Priority:  normal            |   Milestone:  4.9
Component:  Build/Test Tools  |     Version:
 Severity:  normal            |  Resolution:
 Keywords:                    |     Focuses:  javascript
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Comment (by westonruter):

 Let's wait to `fix` until 4.9 is shipped. It should be an `early` task. It
 should be done the same time as #41057.

 For the initial commit, let's just get an `.eslintrc` into `trunk` to
 start.

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Ticket URL: <https://core.trac.wordpress.org/ticket/31823#comment:17>
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