Update phpunit/phpunit requirement from ^6.0 || ^7.0 to ^7.0 || ^8.0#22

Merged

yoanm merged 4 commits intomasterfrom

dependabot/composer/phpunit/phpunit-tw-6.0or-tw-7.0or-tw-8.0

Apr 21, 2019

Commits on Apr 20, 2019

Commits on Apr 21, 2019