fix: upgrade to PHPUnit 10 and PHP 8.1+, fix deprecated GitHub Actions

- Upgrade PHPUnit from 9.5 to 10.5 to fix PHP Parser compatibility issues with PHP 8.3
- Explicitly require nikic/php-parser ^5.3 to ensure compatibility
- Upgrade minimum PHP version from 8.0 to 8.1 (required by PHPUnit 10)
- Update PHPUnit configuration to PHPUnit 10 format
- Update GitHub Actions artifact action from v3 to v4
- Remove PHP 8.0 from test matrix
- Update documentation to reflect PHP 8.1+ requirement

Fixes:
- PHP Warning: Undefined array key 327 in nikic/php-parser
- PhpParser\Lexer::getNextToken(): Return value must be of type int, null returned
- Deprecated actions/upload-artifact v3

Author: frknasir

.github/workflows/tests.yml

@@ -14,7 +14,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        php: [8.0, 8.1, 8.2, 8.3]
+        php: [8.1, 8.2, 8.3]
         stability: [prefer-lowest, prefer-stable]
 
     name: P${{ matrix.php }} - ${{ matrix.stability }} - ${{ matrix.os }}
@@ -90,7 +90,7 @@ jobs:
 
     - name: Archive test results
       if: always()
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: test-results-php-8.2
         path: |

README.md

@@ -7,12 +7,12 @@ A modern, developer-friendly PHP SDK for the [Paystack API](https://paystack.com
 ## Features
 
 - ✅ **Complete API Coverage** - All Paystack API endpoints supported
-- ✅ **Type Safety** - Full PHP 8.0+ type declarations
+- ✅ **Type Safety** - Full PHP 8.1+ type declarations
 - ✅ **Parameter Validation** - Automatic validation of API parameters
 - ✅ **PSR-18 HTTP Client** - Compatible with any PSR-18 HTTP client
 - ✅ **Comprehensive Examples** - Detailed usage examples for all features
 - ✅ **Exception Handling** - Detailed error responses and exception handling
-- ✅ **Modern PHP** - Built for PHP 8.0+ with modern coding standards
+- ✅ **Modern PHP** - Built for PHP 8.1+ with modern coding standards
 
 ## Quick Links
 
@@ -41,7 +41,7 @@ A modern, developer-friendly PHP SDK for the [Paystack API](https://paystack.com
 
 ## Requirements
 
-- **PHP 8.0 or higher**
+- **PHP 8.1 or higher**
 - **PSR-18 HTTP Client** (any implementation)
 - **Composer** for dependency management
 

composer.json

@@ -26,7 +26,7 @@
         }
     },
     "require": {
-        "php": "^8.0",
+        "php": "^8.1",
         "laminas/laminas-diactoros": "^3.5.0",
         "php-http/client-common": "^2.3",
         "php-http/discovery": "^1.14.1",
@@ -37,9 +37,10 @@
         "symfony/options-resolver": "^6.2"
     },
     "require-dev": {
+        "nikic/php-parser": "^5.3",
         "php-http/curl-client": "^2.2",
         "php-http/mock-client": "^1.5",
-        "phpunit/phpunit": "^9.5",
+        "phpunit/phpunit": "^10.5",
         "symfony/var-dumper": "^6.2"
     },
     "scripts": {