Bump PHP version to 8.2 and update dependencies accordingly

Author: tvdijen

composer.json

@@ -21,16 +21,16 @@
         }
     },
     "require": {
-        "php": "^8.1",
+        "php": "^8.2",
         "ext-curl": "*",
 
         "phpstan/extension-installer": "^1.4",
-        "phpstan/phpstan": "^1.11",
-        "phpstan/phpstan-mockery": "^1.1",
-        "phpunit/phpunit": "^10.0 || ^11.0",
-        "psr/log": "^2.0 || ^3.0",
-        "slevomat/coding-standard": "^8.15",
-        "symfony/phpunit-bridge": "^6.4 || ^7.0"
+        "phpstan/phpstan": "^2.1",
+        "phpstan/phpstan-mockery": "^2.0",
+        "phpunit/phpunit": "^11.5 || ^12.3",
+        "psr/log": "^3.0",
+        "slevomat/coding-standard": "^8.20",
+        "symfony/phpunit-bridge": "^7.3 || ^8.0"
     },
     "require-dev": {
         "simplesamlphp/simplesamlphp": "^2.4"