[wp-trac] [WordPress Trac] #43558: Add `composer.json` file for development dependencies

[WordPress Trac]

#43558: Add `composer.json` file for development dependencies
------------------------------+---------------------
 Reporter:  clarinetlord      |       Owner:  pento
     Type:  enhancement       |      Status:  closed
 Priority:  normal            |   Milestone:  5.0
Component:  Build/Test Tools  |     Version:  trunk
 Severity:  normal            |  Resolution:  fixed
 Keywords:  has-patch         |     Focuses:
------------------------------+---------------------

Comment (by johnbillion):

 Replying to [comment:4 netweb]:
 > Copying in @GaryJ's ticket:23912#comment:98 for further context:
 > > The `.travis.yml` files shows PHPUnit can be used at version 4, 5 or
 6, depending on the PHP version available - and that's great, but get it
 down in a `composer.json`, and a `composer install` means that the switch
 statement can be dropped, and developers working locally can get the right
 version too.

 A note for anyone who tries to tackle this: The concept of conditional
 dependencies does not exist in Composer, which is why this logic is in
 `.travis.yml` and why (AFAIK) we can't add PHPUnit as a Composer
 dependency.

--
Ticket URL: <https://core.trac.wordpress.org/ticket/43558#comment:10>
WordPress Trac <https://core.trac.wordpress.org/>
WordPress publishing platform