Merge pull request #19 from weirdan/dependabot/composer/phpunit/phpunit-tw-7.0or-tw-8.0or-tw-9.0or-tw-11.0

Author: dependabot[bot]

composer.json

@@ -11,7 +11,7 @@
     "php": "~7.1 || ~8.0"
   },
   "require-dev": {
-    "phpunit/phpunit": "^7.0 || ^8.0 || ^9.0",
+    "phpunit/phpunit": "^7.0 || ^8.0 || ^9.0 || ^11.0",
     "ext-xdebug": "*",
     "php": "~7.1 || ~8.0",
     "squizlabs/php_codesniffer": "^3.3",