[wp-trac] [WordPress Trac] #30141: Update Grunt devDependencies in package.json

[WordPress Trac]

#30141: Update Grunt devDependencies in package.json
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 Reporter:  jorbin            |      Owner:
     Type:  task (blessed)    |     Status:  new
 Priority:  normal            |  Milestone:  4.1
Component:  Build/Test Tools  |    Version:
 Severity:  normal            |   Keywords:
  Focuses:                    |
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 Many of our devDependencies are out of date.  Let's update them to the
 latest version.

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Ticket URL: <https://core.trac.wordpress.org/ticket/30141>
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