chore: raise minimum PHP version to 7.4

CLAUDE.md

@@ -6,15 +6,15 @@ This file provides guidance to Claude Code (claude.ai/code) when working with co
 
 `bitapps/wp-validator` — a Composer library (PSR-4: `BitApps\WPValidator\` → [src/](src/)) providing Laravel-style validation and sanitization for WordPress. Public API and the full rule list are documented in [README.md](README.md); update it when adding a rule or sanitizer.
 
-**PHP 7.2 is the floor.** No typed properties, no arrow functions, no null coalescing assignment, no union types. Return types on methods are used and fine. [rector.php](rector.php) pins `PhpVersion::PHP_72` and skips the typed-property rectors for this reason.
+**PHP 7.4 is the floor.** No union types or other PHP 8+ syntax. Return types on methods are used and fine. [rector.php](rector.php) pins `PhpVersion::PHP_74` and skips the typed-property rectors.
 
 ## Commands
 
 ```bash
 composer test:unit                                  # full suite (Pest, --testdox, excludes group 'db')
 ./vendor/bin/pest tests/Rules/BetweenTest.php       # single file
 ./vendor/bin/pest --filter='between accepts a length of zero'   # single test by name
-composer compat                                     # PHPCompatibility check against PHP 7.2
+composer compat                                     # PHPCompatibility check against PHP 7.4
 composer rector                                     # Rector dry-run (never auto-applies)
 ```
 

composer.json

@@ -32,7 +32,7 @@
     },
 
     "require": {
-        "php": ">=7.2"
+        "php": ">=7.4"
       },
     "require-dev": {
         "pestphp/pest": "^2.18",

rector.php

@@ -13,7 +13,7 @@
     ->withPaths([
         __DIR__ . '/src',
     ])
-    ->withPhpVersion(PhpVersion::PHP_72)
+    ->withPhpVersion(PhpVersion::PHP_74)
     ->withSkip([
         UnwrapFutureCompatibleIfPhpVersionRector::class,
         TypedPropertyFromStrictConstructorRector::class,
@@ -29,4 +29,4 @@
         // strictBooleans: true,
         // naming: true,
     )
-    ->withSets([SetList::PHP_72]);
+    ->withSets([SetList::PHP_74]);