chore: test against php 8.2 and bump dev dependency versions (#14)

Author: chris-doehring

.github/workflows/phpunit.yml

@@ -13,6 +13,7 @@ jobs:
         php:
           - 8.0
           - 8.1
+          - 8.2
         dependency-version: [prefer-lowest, prefer-stable]
 
     name: php${{ matrix.php }} - ${{ matrix.dependency-version }}

composer.json

@@ -16,10 +16,10 @@
   },
   "require-dev": {
     "phpunit/phpunit": "^9.5",
-    "fakerphp/faker": "^1.15",
-    "phpstan/phpstan": "^0.12.92",
-    "guzzlehttp/psr7": "^1.7",
-    "squizlabs/php_codesniffer": "^3.6"
+    "fakerphp/faker": "^1.20",
+    "phpstan/phpstan": "^1.8",
+    "guzzlehttp/psr7": "^2.4",
+    "squizlabs/php_codesniffer": "^3.7"
   },
   "autoload": {
     "psr-4": {