fix(dependencies): require php 8.0 in composer.json (#9)

Author: kduret

composer.json

@@ -6,7 +6,7 @@
     "minimum-stability": "dev",
     "prefer-stable": true,
     "require": {
-        "php": ">=7.2.5",
+        "php": ">=8.0.0",
         "ext-ctype": "*",
         "ext-iconv": "*",
         "composer/package-versions-deprecated": "1.11.99.4",