Updated PHPUnit

Author: ondrejmirtes

composer.json

@@ -28,7 +28,7 @@
     "phing/phing": "^2.16.0",
     "phpstan/phpstan-phpunit": "^0.12",
     "phpstan/phpstan-strict-rules": "^0.12",
-    "phpunit/phpunit": "^7.0",
+    "phpunit/phpunit": "^7.5.20",
     "slevomat/coding-standard": "^4.5.2",
     "squizlabs/php_codesniffer": "^3.3.2",
     "symfony/console": "^4.0",