Chore - Update TestHelper

Author: nibra

composer.json

@@ -12,7 +12,7 @@
     "require-dev": {
         "doctrine/inflector": "^1.2",
         "joomla/coding-standards": "^3.0@dev",
-        "joomla/test": "^2.0",
+        "joomla/test": "^2.0.1",
         "phpunit/phpunit": "^8.5|^9.0"
     },
     "conflict": {