made `phpunit/phpunit` `require-dev` instead

composer.json

@@ -21,10 +21,10 @@
     }
   },
   "require": {
-    "php": ">=8.1",
-    "phpunit/phpunit": "11.4.4"
+    "php": ">=8.1"
   },
   "require-dev": {
+    "phpunit/phpunit": "11.4.4"
   },
   "scripts": {
     "test": "phpunit"

composer.lock

@@ -4,8 +4,9 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "8e5b1c40fcff22ecd6b93bfbfeacc9b8",
-    "packages": [
+    "content-hash": "dc52ff7e2c972661f8d8e92fc3c9d5e9",
+    "packages": [],
+    "packages-dev": [
         {
             "name": "myclabs/deep-copy",
             "version": "1.x-dev",
@@ -1661,7 +1662,6 @@
             "time": "2024-03-03T12:36:25+00:00"
         }
     ],
-    "packages-dev": [],
     "aliases": [],
     "minimum-stability": "dev",
     "stability-flags": {},