[wp-trac] [WordPress Trac] #39395: Update PHPMailer to 5.2.19

[WordPress Trac]

#39395: Update PHPMailer to 5.2.19
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 Reporter:  Presskopp           |      Owner:
     Type:  defect (bug)        |     Status:  new
 Priority:  normal              |  Milestone:  Awaiting Review
Component:  External Libraries  |    Version:  trunk
 Severity:  normal              |   Keywords:
  Focuses:                      |
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 Not only we should keep this up-to-date generally, there's a good reason
 to update the version WP is using until today with WP4.7.

 see: https://github.com/PHPMailer/PHPMailer/blob/master/changelog.md

 related: #37210

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Ticket URL: <https://core.trac.wordpress.org/ticket/39395>
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