[wp-trac] [WordPress Trac] #60512: Update backbone.js to the latest version (1.6.0)

[WordPress Trac]

#60512: Update backbone.js to the latest version (1.6.0)
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 Reporter:  desrosj                     |       Owner:  (none)
     Type:  enhancement                 |      Status:  new
 Priority:  normal                      |   Milestone:  Awaiting Review
Component:  External Libraries          |     Version:
 Severity:  normal                      |  Resolution:
 Keywords:  good-first-bug needs-patch  |     Focuses:
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Comment (by desrosj):

 Previously: #58930 (1.5.0), #55547 (1.4.1).

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Ticket URL: <https://core.trac.wordpress.org/ticket/60512#comment:1>
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