Bump swiftmailer/swiftmailer from 5.4.12 to 6.2.5

[dependabot[bot]]

Bumps swiftmailer/swiftmailer from 5.4.12 to 6.2.5.

Changelog

Sourced from swiftmailer/swiftmailer's changelog.

6.2.5 (2021-01-12)

• Don't trust properties at destruct time
• Remove invalid PHPDocs param in EventDispatcher interface
• Bump license year
• Removes PHP version from README

6.2.4 (2020-12-08)

• Prevent flushing of the bubble queue when event handler raises another event
• Add support for PHP 8
• Code cleanups

6.2.3 (2019-11-12)

• no changes

6.2.2 (2019-11-12)

• fixed compat with PHP 7.4
• fixed error message when connecting to a stream raises an error before connect()

6.2.1 (2019-04-21)

• reverted "deprecated Swift_CharacterStream_ArrayCharacterStream and Swift_CharacterStream_NgCharacterStream in favor of Swift_CharacterStream_CharacterStream"

6.2.0 (2019-03-10)

• added support for symfony/polyfill-intl-dn
• deprecated Swift_CharacterStream_ArrayCharacterStream and Swift_CharacterStream_NgCharacterStream in favor of Swift_CharacterStream_CharacterStream

6.1.3 (2018-09-11)

• added auto-start to the SMTP transport when sending a message
• tweaked error message when the response from an SMTP server is empty
• fixed missing property in Swift_Mime_IdGenerator
• exposed original body content type with Swift_Mime_SimpleMimeEntity::getBodyContentType()
• fixed typo in variable name in Swift_AddressEncoder_IdnAddressEncoder
• fixed return type in MessageLogger
• fixed missing property addressEncoder in SimpleHeaderFactory class

6.1.2 (2018-07-13)

... (truncated)

Commits

• 698a6a9 bug #1317 Don't trust properties at destruct time (nicolas-grekas)
• 59935da minor #1315 Remove invalid PHPDocs param in EventDispatcher interface (michal...
• 0ce398a Bump license year
• 99d6207 Remove invalid PHPDocs param in EventDispatcher interface
• a5261eb minor #1314 Fix CS for variable names (fabpot)
• 79efd15 Fix CS for variable names
• 636117b minor #1313 fix typos in tests files (abdounikarim)
• 1047591 fix typos in tests files
• 7de4089 minor #1311 Removes PHP version from README (derrabus)
• a07dabf Removes PHP version from README.
• Additional commits viewable in compare view

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