- update to 6.0.0
- add dependency on phpunit/php-file-iterator
- add dependency on sebastian/cli-parser
- raise dependency on phpunit/php-timer 5
- drop depency on sebastian/finder-facade
- drop depency on symfony/console
- sources from git snapshot
- switch to phpunit9

raise depency on phpunit/php-timer 3
raise depency on sebastian/version 3

raise depency on PHP 7.3
raise depency on sebastian/finder-facade 2
raise depency on sebastian/version 2
raise depency on symfony/console 4
use phpunit8 for test suite

rename to phpcpd (and obsolete php-phpunit-phpcpd)
raise dependency on PHP 7.1
raise dependency on phpunit/php-timer 2.0
use phpunit7 for test suite