Plugin Breaks in WP 5.5 – PHPMailer directory change

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WP 5.5 has upgrade : The PHPMailer library just got a major update, going from version 5.2.27 to 6.1.6.

This broke the mailtrap plugin due to class reference line 103 in mailtrap-for-wp.php

public function mailer_setup(PHPMailer $phpmailer)

Needs to be update to

public function mailer_setup(\PHPMailer\PHPMailer\PHPMailer $phpmailer)