Bump min required PHP version to 8.2

Author: jwilsson

.github/workflows/build.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php-versions: ['8.1', '8.2']
+        php-versions: ['8.3', '8.2']
 
     steps:
     - uses: actions/checkout@v2

README.md

@@ -6,7 +6,7 @@
 A [HTTPlug plugin](https://docs.php-http.org/en/latest/plugins/introduction.html) to automatically refresh expired OAuth2 access tokens.
 
 ## Requirements
-* PHP 8.1 or later.
+* PHP 8.2 or later.
 * [jwilsson/oauth2-client](https://github.com/jwilsson/php-oauth2-client) library.
 
 ## Installation

composer.json

@@ -16,7 +16,7 @@
         "test": "pest --coverage"
     },
     "require": {
-        "php": "^8.1",
+        "php": "^8.2",
         "jwilsson/oauth2-client": "^3.0",
         "php-http/client-common": "^2.3",
         "php-http/message": "^1.11",