Fixes #4071: `mail` component renamed to `mailer`, `yii\log\EmailTarget::$mail` renamed to `yii\log\EmailTarget::$mailer`

Mailer.php

@@ -19,7 +19,7 @@ use yii\mail\BaseMailer;
  * ~~~
  * 'components' => [
  *     ...
- *     'mail' => [
+ *     'mailer' => [
  *         'class' => 'yii\swiftmailer\Mailer',
  *         'transport' => [
  *             'class' => 'Swift_SmtpTransport',
@@ -57,7 +57,7 @@ use yii\mail\BaseMailer;
  * To send an email, you may use the following code:
  *
  * ~~~
- * Yii::$app->mail->compose('contact/html', ['contactForm' => $form])
+ * Yii::$app->mailer->compose('contact/html', ['contactForm' => $form])
  *     ->setFrom('from@domain.com')
  *     ->setTo($form->email)
  *     ->setSubject($form->subject)

README.md

@@ -9,7 +9,7 @@ To use this extension,  simply add the following code in your application config
 return [
     //....
     'components' => [
-        'mail' => [
+        'mailer' => [
             'class' => 'yii\swiftmailer\Mailer',
         ],
     ],
@@ -19,7 +19,7 @@ return [
 You can then send an email as follows:
 
 ```php
-Yii::$app->mail->compose('contact/html')
+Yii::$app->mailer->compose('contact/html')
      ->setFrom('from@domain.com')
      ->setTo($form->email)
      ->setSubject($form->subject)