Anons79 Mini Shell

CHANGELOG
=========

6.1
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 * Allow multiple `TagHeaders` with `MailgunApiTransport`

5.2
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 * Not prefixing headers with "h:" is no more deprecated

5.1.0
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 * Not prefixing headers with "h:" is deprecated.

4.4.0
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 * [BC BREAK] Renamed and moved `Symfony\Component\Mailer\Bridge\Mailgun\Http\Api\MailgunTransport`
   to `Symfony\Component\Mailer\Bridge\Mailgun\Transport\MailgunApiTransport`, `Symfony\Component\Mailer\Bridge\Mailgun\Http\MailgunTransport`
   to `Symfony\Component\Mailer\Bridge\Mailgun\Transport\MailgunHttpTransport`, `Symfony\Component\Mailer\Bridge\Mailgun\Smtp\MailgunTransport`
   to `Symfony\Component\Mailer\Bridge\Mailgun\Transport\MailgunSmtpTransport`.

4.3.0
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 * Added the bridge