Merge pull request #51 from puggan/issue-50

Switch from kill-all-exit to a normal exit when a child is done

Update README.md

Delete .php-cs-fixer.cache

Fix styling

Merge pull request #32 from henzeb/socket_interrupted_issue

fixes socket_select interrupted exception

Fix styling

Merge pull request #10 from spatie/concurrent

Add concurrent option

Update README

Update README.md

Update README.md