fix: update PHP requirement to 8.1+ for enum support

The library uses enum syntax which requires PHP 8.1+. Updated:
- composer.json: PHP requirement from ^8.0 to ^8.1
- GitHub Actions: Test matrix from 8.0-8.4 to 8.1-8.4
- README.md: Updated requirements and version info
- Restored enum test (now compatible with minimum PHP version)

All 29 tests passing locally.

Author: iamgerwin

.github/workflows/run-tests.yml

@@ -21,7 +21,7 @@ jobs:
       fail-fast: true
       matrix:
         os: [ubuntu-latest, windows-latest]
-        php: [8.0, 8.1, 8.2, 8.3, 8.4]
+        php: [8.1, 8.2, 8.3, 8.4]
         stability: [prefer-lowest, prefer-stable]
 
     name: P${{ matrix.php }} - ${{ matrix.stability }} - ${{ matrix.os }}

README.md

@@ -48,7 +48,7 @@ composer require iamgerwin/toon-php
 ```
 
 **Requirements:**
-- PHP 8.0+ (v2.x - Latest)
+- PHP 8.1+ (v2.x - Latest)
 - PHP 7.0-7.4 (v1.x - Coming soon)
 
 ## Quick Start
@@ -273,10 +273,10 @@ This package maintains the highest quality standards:
 
 - ✅ **PHPStan Level 6** (strict static analysis)
 - ✅ **PSR-12** code style compliance
-- ✅ **100% test coverage** (33 tests, 67 assertions)
+- ✅ **100% test coverage** (29 tests, 63 assertions)
 - ✅ **Zero dependencies** (pure PHP)
 - ✅ **Continuous Integration** (GitHub Actions)
-- ✅ **Multi-version testing** (PHP 8.0-8.4)
+- ✅ **Multi-version testing** (PHP 8.1-8.4)
 
 ```bash
 composer test      # Run Pest test suite
@@ -339,7 +339,7 @@ Contributions are welcome! This package follows:
 
 ## Versioning
 
-- **v2.x** (Latest): PHP 8.0-8.4 with modern features
+- **v2.x** (Latest): PHP 8.1-8.4 with modern features
 - **v1.x** (Planned): PHP 7.0-7.4 compatibility
 
 Composer automatically selects the right version for your PHP installation.

composer.json

@@ -19,7 +19,7 @@
         }
     ],
     "require": {
-        "php": "^8.0"
+        "php": "^8.1"
     },
     "require-dev": {
         "pestphp/pest": "^1.21|^2.0",

tests/ToonTest.php

@@ -99,7 +99,17 @@
     expect($encoded)->toContain('2024-01-01');
 });
 
-// Enum test skipped - requires PHP 8.1+ and would cause parse errors on PHP 8.0
+it('handles enums', function () {
+    enum Status: string
+    {
+        case Active = 'active';
+        case Inactive = 'inactive';
+    }
+
+    $data = ['status' => Status::Active];
+    $encoded = Toon::encode($data);
+    expect($encoded)->toContain('active');
+});
 
 it('handles empty arrays', function () {
     $encoded = Toon::encode([]);