Exclude phpunit.xml in .gitignore.
Exclude phpunit.xml in .gitignore.

[ci skip]

steverhoades/event-loop,steverhoades/event-loop,mkrauser/event-loop,kaduev13/event-loop,kaduev13/event-loop,reactphp/event-loop,clue-labs/event-loop,mkrauser/event-loop