Merge pull request #11 from sunrise-php/renovate/phpunit-phpunit-7.x

Update dependency phpunit/phpunit to v7.5.11

Author: fenric

composer.json

@@ -25,7 +25,7 @@
         "sunrise/coding-standard": "^1.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "7.5.6",
+        "phpunit/phpunit": "7.5.11",
         "phpunit/php-code-coverage": "6.1.4",
         "sunrise/http-factory": "1.0.6"
     },