updates php matrix, using flexible phpunit version

Author: tsamaya

.github/workflows/ci.yml

@@ -4,7 +4,7 @@ on:
   push:
   pull_request:
   schedule:
-    - cron: '15 22 2 * *'
+    - cron: "15 22 2 * *"
 
 env:
   OPENCAGE_API_KEY: ${{ secrets.GEO_CODER_OPENCAGE_API_KEY }}
@@ -14,15 +14,15 @@ jobs:
     strategy:
       matrix:
         # https://www.php.net/supported-versions.php
-        php-version: ['8.2', '8.3', '8.4']
+        php-version: ["8.1", "8.2", "8.3", "8.4", "8.5"]
 
     name: PHP OpenCage Geocode
 
     runs-on: ubuntu-latest
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Set up PHP ${{ matrix.php-version }}
         uses: shivammathur/setup-php@v2

composer.json

@@ -18,7 +18,7 @@
     "php": ">=8.0"
   },
   "require-dev": {
-    "phpunit/phpunit": "~11.0",
+    "phpunit/phpunit": "^10.5 || ^11.0 || ^12.0",
     "squizlabs/php_codesniffer": "^3.7",
     "phpstan/phpstan": "^2.0.0"
   },