Expand PHP version support to include 7.4 with adjusted constraints and updates

- Updated `composer.json` to support PHP 7.4 alongside 8.2.
- Refactored Rector configuration for improved compatibility with PHP 7.4 downgrade.
- Introduced a `--dry-run` Rector script for safer code testing in `composer.json`.
- Updated `README.md` to reflect new PHP version compatibility.

Author: georgedeploy

README.md

@@ -1,6 +1,6 @@
 # PHP Typed Values
 
-A PHP 8.2 library of typed value objects for common PHP data types.
+A PHP 7.4 || 8.2 library of typed value objects for common PHP data types.
 
 Building blocks for a DTO's, ValueObjects, Entities, etc.
 

composer.json

@@ -4,7 +4,7 @@
   "type": "library",
   "license": "MIT",
   "require": {
-    "php": ">=8.2"
+    "php": ">=7.4,<8.0 || >=8.2"
   },
   "require-dev": {
     "friendsofphp/php-cs-fixer": "^v3.89",
@@ -52,8 +52,8 @@
       "@mutate",
       "echo '\\n\\n\\033[1;32mPre-commit checks passed!\\033[0m\\n'"
     ],
-    "rector": [
-      "./vendor/bin/rector process --config rector/toPhp7.4.php"
+    "rector-dry-run": [
+      "./vendor/bin/rector process --config rector/toPhp7.4.php --dry-run"
     ],
     "test": [
       "./vendor/bin/pest"

rector/toPhp7.4.php

@@ -3,17 +3,10 @@
 declare(strict_types=1);
 
 use Rector\Config\RectorConfig;
-use Rector\Set\ValueObject\DowngradeLevelSetList;
 
-return static function (RectorConfig $rectorConfig): void {
-    // We will process code in this specific directory during CI
-    $rectorConfig->paths([
-        __DIR__ . '/../',
-    ]);
-
-    // Downgrade rules to make code compatible with PHP 7.2
-    // This handles readonly classes, typed properties, union types, etc.
-    $rectorConfig->sets([
-        DowngradeLevelSetList::DOWN_TO_PHP_74,
-    ]);
-};
+return RectorConfig::configure()
+    ->withPaths([
+        __DIR__ . '/../src',
+//        __DIR__ . '/../tests',
+    ])
+    ->withDowngradeSets(php74: true);