feat: email abstract

src/Abstracts/EmailAbstract.php

@@ -49,7 +49,7 @@ abstract class EmailAbstract implements EmailInterface {
     /**
      * @var array
      */
-    protected $headers;
+    protected $headers = [];
 
     /**
      * Define unique email ID.

src/Emails/Email.php

-<?php
-
-namespace WPDesk\Library\WPEmail\Emails;
-
-use WPDesk\Library\WPEmail\Abstracts\EmailAbstract;
-
-class Email extends EmailAbstract {
-
-    const ID = 'email';
-
-    /**
-     * Define unique email ID.
-     *
-     * @return string
-     */
-    public function get_id(): string {
-        return self::ID;
-    }
-
-}