Build/Test Tools: Move the PHP 7.3 Travis job in 5.0 branch after the JS tests, for consistency with other branches.

See #42387, #40407.

git-svn-id: https://develop.svn.wordpress.org/branches/5.0@47323 602fd350-edb4-49c9-b593-d223f7449a82

Author: SergeyBiryukov

.travis.yml

@@ -12,9 +12,9 @@ env:
     - WP_TRAVISCI=travis:phpunit
 matrix:
   include:
-  - php: 7.3
   - php: 7.1
     env: WP_TRAVISCI=travis:js
+  - php: 7.3
   - php: 5.6
     env: WP_TRAVIS_OBJECT_CACHE=true
     services: memcached