Merge branch 'master' into 5.0.0

Author: byjg

README.md

@@ -192,5 +192,13 @@ composer require "byjg/anydataset=5.0.*"
 vendor/bin/phpunit
 ```
 
+## Dependencies
+
+```mermaid
+flowchart TD
+    byjg/anydataset --> byjg/serializer
+    byjg/anydataset --> byjg/xmlutil
+```
+
 ----
 [Open source ByJG](http://opensource.byjg.com)

composer.json

@@ -10,14 +10,14 @@
   "minimum-stability": "dev",
   "require": {
     "php": ">=7.4",
-    "byjg/xmlutil": "5.0.0.x-dev",
-    "byjg/serializer": "5.0.0.x-dev"
+    "byjg/xmlutil": "4.9.*",
+    "byjg/serializer": "4.9.*"
   },
   "suggest": {
     "ext-dom": "*"
   },
   "require-dev": {
-    "phpunit/phpunit": "5.7.*|7.4.*|^9.5",
+    "phpunit/phpunit": "^9.6",
     "vimeo/psalm": "^4.24"
   },
   "license": "MIT"