[wp-trac] [WordPress Trac] #34350: Update Backbone to 1.2.3 and Underscore to 1.8.3

[WordPress Trac]

#34350: Update Backbone to 1.2.3 and Underscore to 1.8.3
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 Reporter:  caseypatrickdriscoll       |       Owner:  adamsilverstein
     Type:  enhancement                |      Status:  assigned
 Priority:  normal                     |   Milestone:  4.5
Component:  External Libraries         |     Version:  4.4
 Severity:  normal                     |  Resolution:
 Keywords:  needs-testing needs-patch  |     Focuses:  javascript
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Comment (by adamsilverstein):

 Replying to [comment:33 ericlewis]:
 > I ran a `git bisect` on Backbone and tracked the breaking change down to
 [https://github.com/jashkenas/backbone/commit/020bec3b221af747961e7e459b33908765e34a56
 this commit].

 Nice work tracking that down! Yea git bisect!

 Wow, thats a pretty big change to Backbone events, no wonder things broke.
 We should audit our use of events to make sure nothing else broke.

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Ticket URL: <https://core.trac.wordpress.org/ticket/34350#comment:38>
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