[Security] Bump swiftmailer/swiftmailer from 5.4.3 to 5.4.9

[dependabot-preview]

Bumps swiftmailer/swiftmailer from 5.4.3 to 5.4.9. This update includes security fixes.

Vulnerabilities fixed

Sourced from The PHP Security Advisories Database.

Remote Code Execution when using the mail transport

Affected versions: >=4.0.0, <5.0.0; >=5.0.0, <5.4.5

Changelog

Sourced from swiftmailer/swiftmailer's changelog.

5.4.9 (2018-01-23)

• no changes, last version of the 5.x series

5.4.8 (2017-05-01)

• fixed encoding inheritance in addPart()
• fixed sorting MIME children when their types are equal

5.4.7 (2017-04-20)

• fixed NTLMAuthenticator clobbering bcmath scale

5.4.6 (2017-02-13)

• removed exceptions thrown in destructors as they lead to fatal errors
• switched to use sha256 by default in DKIM as per the RFC
• fixed an 'Undefined variable: pipes' PHP notice
• fixed long To headers when using the mail transport
• fixed NTLMAuthenticator when no domain is passed with the username
• prevented fatal error during unserialization of a message
• fixed a PHP warning when sending a message that has a length of a multiple of 8192

5.4.5 (2016-12-29)

• SECURITY FIX: fixed CVE-2016-10074 by disallowing potentially unsafe shell characters

  Prior to 5.4.5, the mail transport (Swift_Transport_MailTransport) was vulnerable to passing
  arbitrary shell arguments if the "From", "ReturnPath" or "Sender" header came
  from a non-trusted source, potentially allowing Remote Code Execution

• deprecated the mail transport

5.4.4 (2016-11-23)

• reverted escaping command-line args to mail (PHP mail() function already does it)

Commits

• 7ffc1ea prepared the 5.4.9 release
• 73e460c minor #1037 Remove extra lines (carusogabriel)
• 0bb69be Remove extra lines
• c126567 minor #1021 Tiny update composer.json (Rotzbua)
• 90aaf27 Update composer.json
• 93df08e minor #995 [Docs] Converted mysql_* into PDO calls (Oire)
• 88cd352 Docs: Converted mysql_* into PDO calls. See #994
• 0dcea92 minor #990 Updated Homepage and Documentation Link (jgacuca567)
• 64bbfcb Updated Homepage and Documentation Link
• f61bd08 fixed URL in composer.json
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #8.