Fix: Outlook date format

[gajosadrian]

Ddeboer\Imap\Exception\InvalidDateHeaderException

Invalid Date header found: "Tue, 27 Oct 2020 10:25:58 +0000 <AM8PR08MB56censored12829D160@AM8censored50.eurprd08.prod.outlook.com>"
imap_alerts (0):
imap_errors (0):

  at C:\xampp\htdocs\Modular-App\vendor\ddeboer\imap\src\Message\AbstractMessage.php:127
    123|
    124|         try {
    125|             $date = new \DateTimeImmutable($alteredValue);
    126|         } catch (\Throwable $ex) {
  > 127|             throw new InvalidDateHeaderException(\sprintf('Invalid Date header found: "%s"', $dateHeader), 0, $ex);
    128|         }
    129|
    130|         return $date;
    131|     }

[Slamdunk]

Please add the input and the expected ISO format into the corresponding test:

imap/tests/MessageTest.php

Line 595 in d439d09

public function provideDateCases(): array