Add composer test command

Author: JBlond

composer.json

@@ -59,7 +59,12 @@
         "php_src": "phpcs --standard=phpcs.xml -s -p --colors ./lib/",
         "php_test": "phpcs --standard=phpcs.xml -s -p --colors ./tests/",
         "phpmd": "phpmd ./ ansi cleancode,codesize,controversial,design,naming,unusedcode --exclude vendor",
-        "changelog": "php generateChangelog.php"
+        "changelog": "php generateChangelog.php",
+        "test": [
+            "@php_src",
+            "@php_test",
+            "phpunit --colors=always --testdox"
+        ]
     },
     "scripts-descriptions": {
         "phpunit": "Run PHPUnit tests",