Bump MimeKit from 3.6.0 to 4.2.0

[dependabot]

Bumps MimeKit from 3.6.0 to 4.2.0.

Changelog

Sourced from MimeKit's changelog.

MimeKit 4.2.0 (2023-09-02)

• Follow the spec more closely for allowable header field characters. (issue #936)
• Avoid throwing NRE when an RC2 algorithm was used for S/MIME w/o parameters. (issue #941)
• Added a few more (undocumented) TnefPropertyIds.
• Optimized AttachmentCollection.Add(byte[], ...) by not copying the data to a new stream.
• Improved performance of HtmlTokenizer.
• Added new HtmlTokenizer constructors that take a Stream instead of a TextReader. This allows for a slight performance improvement over using a TextReader as well.
• Lazy-allocate Base64/QuotedPrintable decoders when decoding rfc2047-encoded headers. This is a very small reduction in GC pressure.
• Reduced memory allocations in Rfc2047.DecodePhrase() and DecodeText().
• Avoid allocating empty List<string>s in DomainList.ctor(), lazily allocate the list only when a domain is added. Another minor reduction in GC pressure.
• Updated the Date parser to allocate an internal list of tokens with a optimal initial capacity to avoid the need for reallocating.

MimeKit 4.1.0 (2023-06-17)

• Readded the System.Net.Mail-to-MimeKit conversion APIs for the netstandard2.x frameworks. (issue #913)
• Fixed the MimeEntity.LoadAsync() overloads that take a ContentType parameter to to properly wait to dispose of the stream until after the entity has been parsed. (issue #916)
• Optimized conversion between HeaderId and string.
• Added a new IMimeParser interface that both MimeParser and ExperimentalMimePraser implement.
• Added "unicode" to the list of charset aliases for UTF-8. (issue #923)
• Added support for the Edwards Curve DSA PGP public key algorithm. (issue #932)
• Bumped System.Security.Cryptography.Pkcs dependency to 7.0.2.
• Bumped BouncyCastle dependency to 2.2.1.

MimeKit 4.0.0 (2023-04-15)

• Ported to BouncyCastle v2.1.1. (issue #865)
• Fixed System.Net.Mail.MailMessage -> MimeMessage converter to reset MailMessage attachment/alternateview streams back to 0 after copying them. (issue #907)
• Added support for the signature expiration field in DKIM signatures which can be specified using the new DkimSigner.SignatureExpiresAfter property.
• Added equality operators for TnefNameId and TnefPropertyTag.
• Fixed MimeMessage's MessageId, ResentMessageId and InReplyTo property setters to be more lax. (issue #912)
• MimeKit and MimeKitLite nuget packages now include MimeKit.dll.config that contain assembly redirects which may resolve some issues some developers were having with loading assemblies such as System.Runtime.CompilerServices.Unsafe.dll.

MimeKit 3.6.1 (2023-03-19)

... (truncated)

Commits

• a8d6aa2 Bumped version to 4.2.0
• c69c840 Updated test.ps1
• 3f92d9d Removed a DateUtils.Parse() method that is no longer needed
• 9ed9543 Simplify HtmlTokenizer.SkipByteOrderMark()
• 71a6e2a Added more Rfc2047 unit tests
• efbd8b0 Added more ValueStringBuilder unit tests
• d09fa1e Added ByteArrayBuilderTests.cs
• 76839db Reduced memory allocations in Rfc2047.DecodePhrase() and DecodeText()
• 8cc5a4a Fixed test.ps1
• 5061fc2 Update main.yml
• Additional commits viewable in compare view

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[dependabot]

Superseded by #68.