[wp-trac] [WordPress Trac] #44771: Update Travis CI build matrix for PHP 7.3

[WordPress Trac]

#44771: Update Travis CI build matrix for PHP 7.3
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 Reporter:  desrosj           |       Owner:  (none)
     Type:  task (blessed)    |      Status:  new
 Priority:  normal            |   Milestone:  5.0
Component:  Build/Test Tools  |     Version:
 Severity:  normal            |  Resolution:
 Keywords:  has-patch         |     Focuses:
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Comment (by desrosj):

 On Travis, [https://github.com/travis-ci/travis-
 ci/issues/9717#issuecomment-429564626 `7.3` now aliases to `7.3.0RC3`].
 The extra steps originally added in [43673] can now be removed in favor of
 the same approach used for other versions of PHP.

 [https://travis-ci.org/desrosj/wordpress-develop/builds/441457919 Test
 build showing 7.3.0RC3 is used].

 Incoming patch with the needed changes.

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Ticket URL: <https://core.trac.wordpress.org/ticket/44771#comment:14>
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