Added more classes

Author: indy2kro

composer.json

@@ -10,7 +10,9 @@
     "homepage" : "https://github.com/indy2kro/php-iso",
     "license" : "GPL-2.0",
     "require" : {
-        "php" : ">=8.2"
+        "php": ">=8.2",
+        "ext-mbstring": "*",
+        "nesbot/carbon": "^3.8"
     },
     "require-dev" : {
         "squizlabs/php_codesniffer" : ">=3.7",