make sure we use a phpunit version copatible with php 8.1

diff --git a/composer.json b/composer.json
index 04c4361..9fd5985 100644 (file)
--- a/composer.json
+++ b/composer.json
@@ -10,7 +10,7 @@
     },
     "_comment::tests": "The dev packages below require a minimum of php 5.6, even though we support php 5.3. Can we manage to do better?",
     "require-dev": {
-        "phpunit/phpunit": "^5.0 || ^8.5.12",
+        "phpunit/phpunit": "^5.0 || ^8.5.14",
         "phpunit/phpunit-selenium": "*",
         "yoast/phpunit-polyfills": "*",
         "ext-curl": "*",