Switch to phpunit 7

Author: redthor

composer.json

@@ -21,7 +21,7 @@
  },
  "require-dev": {
  "friendsofphp/php-cs-fixer": "^2.0",
- "phpunit/phpunit": "^5.0"
+ "phpunit/phpunit": "^7.0"
  },
  "autoload": {
  "psr-4": {