[wp-trac] [WordPress Trac] #58930: Update backbone.js to the latest version (1.5.0)

[WordPress Trac]

#58930: Update backbone.js to the latest version (1.5.0)
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 Reporter:  desrosj                     |       Owner:  (none)
     Type:  enhancement                 |      Status:  new
 Priority:  normal                      |   Milestone:  6.4
Component:  External Libraries          |     Version:
 Severity:  normal                      |  Resolution:
 Keywords:  needs-patch good-first-bug  |     Focuses:
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Comment (by Hareesh Pillai):

 Previously #55547

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Ticket URL: <https://core.trac.wordpress.org/ticket/58930#comment:1>
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