[buddypress-trac] [BuddyPress Trac] #5627: Update phpunit grunt task to not use deprecated util

[buddypress-trac]

#5627: Update phpunit grunt task to not use deprecated util
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 Reporter:  netweb        |       Owner:
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  Core          |     Version:
 Severity:  normal        |  Resolution:
 Keywords:  has-patch     |
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Changes (by netweb):

 * keywords:  needs-patch => has-patch
 * milestone:  Future Release => Awaiting Review


Comment:

 Upstream via [https://core.trac.wordpress.org/ticket/27343#comment:5
 27343] we have gone with the method to include `grunt-legacy-util`

 In 5627.diff:
 Grunt is deprecating the Grunt.Util.* api, adding `grunt-legacy-util` will
 allow us to continue using `grunt.util.spawn` to spawn the multiple
 `phpunit` Grunt tasks.
 * Adds `grunt-legacy-util` to `package.json`
 * Requires fresh `npm install` to update dependencies

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Ticket URL: <https://buddypress.trac.wordpress.org/ticket/5627#comment:2>
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