Fix tests

WP 5.2 dropped support for PHP versions before 5.6.
7 jobs for fix/5.3-test in 3 minutes and 13 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Test
passed #3932
PHPCS

00:02:56

passed #3926
PHPunit:PHP5.3:MySQL

00:03:13

passed #3927
PHPunit:PHP5.6:MySQL

00:02:49

passed #3928
PHPunit:PHP7.0:MySQL

00:02:50

passed #3929
PHPunit:PHP7.1:MySQL

00:02:52

passed #3930
PHPunit:PHP7.2:MySQL

00:03:01

passed #3931
PHPunit:PHP7.3:MySQL

00:02:51