Add support for Laravel 10 (#16)

* Update badge
* Update composer.json

Author: mrk-j

README.md

@@ -5,7 +5,7 @@
 [![Buy me a coffee](https://img.shields.io/badge/-Buy_me_a_coffee-gray?logo=buymeacoffee)](https://www.buymeacoffee.com/simonschaufi)
 ![GitHub](https://img.shields.io/github/license/simonschaufi/laravel-dkim)
 [![Packagist Downloads](https://img.shields.io/packagist/dt/simonschaufi/laravel-dkim)](https://packagist.org/packages/simonschaufi/laravel-dkim)
-[![Laravel 9](https://img.shields.io/badge/Laravel-9-ff2d20)](https://laravel.com)
+[![Laravel 9/10](https://img.shields.io/badge/Laravel-9/10-ff2d20)](https://laravel.com)
 
 A Laravel package, that allows signing emails with DKIM.
 

composer.json

@@ -10,11 +10,11 @@
         }
     ],
     "require": {
-        "illuminate/mail": "^9.0"
+        "illuminate/mail": "^9.0 || ^10.0"
     },
     "autoload": {
         "psr-4": {
             "SimonSchaufi\\LaravelDKIM\\": "src/"
         }
     }
-}
+}