update dev dependencies

Author: VasekPurchart

composer.json

@@ -16,12 +16,12 @@
 	},
 	"require-dev": {
 		"consistence/coding-standard": "3.7",
-		"jakub-onderka/php-console-highlighter": "0.3.2",
+		"jakub-onderka/php-console-highlighter": "0.4",
 		"jakub-onderka/php-parallel-lint": "1.0",
-		"phpunit/phpunit": "6.5.12",
-		"symfony/console": "~3.0",
-		"symfony/debug": "~3.0",
-		"vasek-purchart/phing-tester": "1.0.1"
+		"phpunit/phpunit": "7.5.1",
+		"symfony/console": "~4.0",
+		"symfony/debug": "~4.0",
+		"vasek-purchart/phing-tester": "2.0"
 	},
 	"autoload": {
 		"psr-4": {

tests/phpunit.xml

@@ -15,7 +15,6 @@
 		<log
 			type="coverage-html"
 			target="../build/log/coverage/html"
-			charset="UTF-8"
 			lowUpperBound="100"
 			highLowerBound="100"
 		/>