[Security] Bump symfony/mime from 4.3.6 to 4.4.0

[dependabot-preview]

Bumps symfony/mime from 4.3.6 to 4.4.0. This update includes a security fix.

Vulnerabilities fixed

Sourced from The PHP Security Advisories Database.

CVE-2019-18888: Prevent argument injection in a MimeTypeGuesser

Affected versions: >=4.3.0, <4.3.8

Changelog

Sourced from symfony/mime's changelog.

4.4.0

• [BC BREAK] Removed NamedAddress (Address now supports a name)
• Added PHPUnit constraints
• Added AbstractPart::asDebugString()
• Added Address::fromString()

4.3.3

• [BC BREAK] Renamed method Headers::getAll() to Headers::all().

4.3.0

• Introduced the component as experimental

Commits

• 89da7b6 Merge branch '4.3' into 4.4
• 22aecf6 [Mime] fix guessing mime-types of files with leading dash
• bf6913d Merge branch '4.3' into 4.4
• 86fe792 minor #33963 Add .gitignore to .gitattributes (reedy)
• ae5a66b Merge branch '4.3' into 4.4
• 592a01c Add Message-Id to SentMessage when sending an email
• a5f8601 Add .gitignore to .gitattributes
• c7238f7 added image/svg MIME support
• b2062b9 Merge branch '4.3' into 4.4
• 82e1f6b Adding .gitattributes to remove Tests directory from "dist"
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #5.