Add missing `.gitattributes` for the ignores

3 jobs for add/wp-org-deploy in 3 minutes and 13 seconds (queued for 4 seconds)
Status Name Job ID Coverage
  Test
failed PHPunit:PHP7.2:MySQL #2648
allowed to fail

00:02:41

failed PHPunit:PHP7.3:MySQL #2649
allowed to fail

00:02:13

 
  Deploy
passed PluginSVN #2650

00:00:32

 
Name Stage Failure
failed
PHPunit:PHP7.3:MySQL Test
No job log
failed
PHPunit:PHP7.2:MySQL Test
No job log