Updated dependencies

Author: kukulich

composer.json

@@ -15,7 +15,7 @@
 		"jakub-onderka/php-parallel-lint": "0.9.2",
 		"phing/phing": "2.16",
 		"phpstan/phpstan": "0.8.0",
-		"phpunit/phpunit": "6.2.3"
+		"phpunit/phpunit": "6.3.0"
 	},
 	"autoload": {
 		"psr-4": {