Fixed build

Author: ondrejmirtes

composer.json

@@ -19,7 +19,7 @@
 		"phing/phing": "^2.16.0",
 		"phpstan/phpstan-phpunit": "^0.12",
 		"phpstan/phpstan-strict-rules": "^0.12",
-		"phpunit/phpunit": "^7.1.3",
+		"phpunit/phpunit": "^7.5.18",
 		"slevomat/coding-standard": "^4.5.2"
 	},
 	"config": {