Update dev dependencies (#12)

Author: marmichalski

composer.json

@@ -3,15 +3,16 @@
     "description": "Support library for signing Samsung Knox API access tokens",
     "type": "library",
     "require": {
+        "php": ">=7.4",
         "ext-json": "*",
         "firebase/php-jwt": "^5.0",
         "ramsey/uuid": "^3.8 || ^4.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^9.3",
-        "friendsofphp/php-cs-fixer": "^3.1",
-        "phpstan/phpstan": "^0.12.47",
-        "phpstan/phpstan-phpunit": "^0.12.16"
+        "friendsofphp/php-cs-fixer": "^3.11",
+        "phpstan/phpstan": "^1.8.6",
+        "phpstan/phpstan-phpunit": "^1.1"
     },
     "license": "MIT",
     "authors": [
@@ -30,6 +31,11 @@
             "Proget\\Tests\\Samsung\\KnoxToken\\": "tests/"
         }
     },
+    "config": {
+        "platform": {
+            "php": "7.4.30"
+        }
+    },
     "scripts": {
         "check-cs": "php-cs-fixer fix --dry-run",
         "fix-cs": "php-cs-fixer fix",