Drop PHP8.1 support

Author: magicsunday

.github/workflows/ci.yml

@@ -11,7 +11,7 @@ jobs:
         strategy:
             fail-fast: false
             matrix:
-                php: [ '8.1', '8.2', '8.3', '8.4' ]
+                php: [ '8.2', '8.3', '8.4' ]
 
         steps:
             -   id: checkout

composer.json

@@ -14,7 +14,7 @@
         "issues": "https://github.com/magicsunday/jsonmapper/issues"
     },
     "require": {
-        "php": ">=8.1.0 <8.5.0",
+        "php": ">=8.2.0 <8.5.0",
         "ext-json": "*",
         "symfony/property-info": "^6.0 || ^7.0",
         "symfony/property-access": "^6.0 || ^7.0",

rector.php

@@ -44,7 +44,7 @@
         SetList::CODING_STYLE,
         SetList::CODE_QUALITY,
         SetList::DEAD_CODE,
-        LevelSetList::UP_TO_PHP_81,
+        LevelSetList::UP_TO_PHP_82,
     ]);
 
     // Skip some rules