update dev dependencies

Author: VasekPurchart

build.xml

@@ -39,7 +39,6 @@
 			checkreturn="true"
 		>
 			<arg value="install"/>
-			<arg value="--no-suggest"/>
 		</exec>
 	</target>
 

composer.json

@@ -16,10 +16,10 @@
 		"slevomat/coding-standard": "~6.0"
 	},
 	"require-dev": {
-		"jakub-onderka/php-console-highlighter": "0.4",
-		"jakub-onderka/php-parallel-lint": "1.0",
-		"phing/phing": "2.16.1",
-		"phpunit/phpunit": "7.5.1"
+		"phing/phing": "2.17.2",
+		"php-parallel-lint/php-console-highlighter": "1.0",
+		"php-parallel-lint/php-parallel-lint": "1.3.2",
+		"phpunit/phpunit": "8.5.25"
 	},
 	"autoload": {
 		"psr-4": {

tests/.gitignore

@@ -0,0 +1 @@
+/.phpunit.result.cache

tests/phpunit.xml

@@ -8,6 +8,7 @@
 	beStrictAboutOutputDuringTests="true"
 	beStrictAboutTestsThatDoNotTestAnything="true"
 	beStrictAboutTodoAnnotatedTests="true"
+	convertDeprecationsToExceptions="true"
 	failOnRisky="true"
 	failOnWarning="true"
 >