- Fixed some function arguments

src/Email/SwiftMailer.php

@@ -12,6 +12,8 @@ class SwiftMailer implements MailerInterface
     
     protected $to;
     
+    protected $cc;
+    
     public function __construct(EmailConfiguration $configuration) {
         $this->emailConfiguration = $configuration;
         
@@ -25,20 +27,30 @@ class SwiftMailer implements MailerInterface
         $swiftObj = ( new \Swift_Message($subject) )
             ->setFrom( $this->from )
             ->setTo( $this->to )
+            ->setCC($this->cc ?? [])
             ->setBody( $message, $html ? 'text/html' : 'text/plain' );
         
         return ( new \Swift_Mailer($this->transport) )->send($swiftObj);
     }
     
-    public function setFrom($from) : MailerInterface
+    public function setFrom(/*stringable|array*/ $from) : MailerInterface
     {
         $this->from = $from;
+        
         return $this;
     } 
     
-    public function setTo($to) : MailerInterface
+    public function setTo(/*stringable|array*/ $to) : MailerInterface
     {
         $this->to = $to;
+        
+        return $this;
+    }
+    
+    public function setCC(/*stringable|array*/ $cc) : MailerInterface
+    {
+        $this->cc = $cc;
+        
         return $this;
     }