Pare down dev dependencies a bit

RoboFile.php

@@ -102,10 +102,7 @@ class RoboFile extends \Robo\Tasks {
 	 */
 	public function coverage()
 	{
-		$this->taskPhpUnit()
+		$this->_run(['phpdbg -qrr -- vendor/bin/phpunit -c build']);
-			->configFile('build/phpunit.xml')
-			->printed(true)
-			->run();
 	}
 
 	/**

composer.json

@@ -3,6 +3,9 @@
 	"description": "Basic PHP Framework",
 	"license":"MIT",
 	"autoload": {
+		"files": [
+			"src/functions.php"
+		],
 		"psr-4": {
 			"Aviat\\Ion\\": "src/"
 		}
@@ -26,18 +29,14 @@
 	"require-dev": {
 		"pdepend/pdepend": "^2.2",
 		"sebastian/phpcpd": "^2.0",
-		"theseer/phpdox": "~0.9.0",
+		"theseer/phpdox": "dev-master",
 		"phploc/phploc": "^3.0",
 		"phpmd/phpmd": "^2.4",
-		"phpunit/phpunit": "^5.4",
+		"phpunit/phpunit": "^6.0",
 		"robmorgan/phinx": "^0.6.4",
-		"humbug/humbug": "~1.0@dev",
 		"consolidation/robo": "~1.0@RC",
-		"henrikbjorn/lurker": "^1.1.0",
-		"nikic/php-parser": "3.0.*@beta",
 		"monolog/monolog": "1.*",
 		"squizlabs/php_codesniffer": "^3.0.0@RC",
-		"vimeo/psalm": "^0.3.24",
 		"phpstan/phpstan": "^0.6.4"
 	},
 	"scripts": {