Bump MailKit from 3.0.0 to 3.2.0 in /Framework

[dependabot]

Bumps MailKit from 3.0.0 to 3.2.0.

Changelog

Sourced from MailKit's changelog.

MailKit 3.2.0 (2022-03-26)

• Do not use ApplicationProtocols with SSL. (issue #1352)
• Updated GMail, Yahoo, and Outlook.com certificates.
• Lazy-initialize MessageSummary.Keywords. This reduces memory usage when the client isn't requesting Flags/Keywords.
• Hard-cache some IMAP FETCH-related tokens in order to relieve GC pressure for commands like FETCH where there can be a LOT of responses containing the same tokens over and over again.
• Converted some IMAP async Task methods to use ValueTask to reduce GC pressure.
• Reduced string allocations in the IMAP logic by avoiding use of ToUpperInvariant().
• Added non-async implementations for ImapStream APIs to be used by the synchronous public APIs to avoid some async overhead.
• Reduce MemoryStream (and thus byte[]) allocations by using a new ByteArrayBuilder.
• Rewrote the IMAP CAPABILITY parser to avoid allocating strings.
• Fixed some cases where IMAP NIL tokens were not compared case insensitively.
• Always include the VERSION block in NTLM messages. (issue #1340)
• Target .NET Framework v4.6.1 instead of v4.6 to match the changes in MimeKit.
• Capture the Socket timeout value in Read/WriteAsync() to have it in case of exceptions. (issue #1327)

MailKit 3.1.1 (2022-01-30)

• Reduced string allocations in Pop3Engine's capability parser.
• Updated GMail and Outlook.com SSL certificates.
• Modified SmtpClient to try and use the system hostname in EHLO/HELO commands. (issue #1314)

MailKit 3.1.0 (2022-01-14)

• Fixed NTLM to always prefer the supplied domain over the TargetName or TargetInfo.DomainName. (issue #582)
• Updated GMail and Outlook.com SSL certificate info.
• Added a new SslCipherSuite property to each client that allows developers to get information about the SSL/TLS cipher suite that was negotiated with the server. (pull #1312)
• Reduced string allocations in SmtpClient's EHLO capability parsing logic.
• Default ProtocolLogger.RedactSecrets to true for added added security.
• Added work-around for parsing malformed GMail ENVELOPE responses that reverse the name and address components of the Sender address. (pull #1319)
• Added net6.0 to the list of TargetFrameworks.

Commits

• 77eb925 Bumped version to 3.2.0
• 1af5110 Do not use ApplicationProtocols with SSL
• 73c6f67 Updated GMail and Yahoo certificates
• c3a48ac Bump nunit from 3.13.2 to 3.13.3 (#1350)
• a736d88 Lazy-initialize MessageSummary.Keywords
• ab1e087 Use token.Value.ToString() in case the token is a char token
• 16adde1 Updated GMail certificates
• d284a2d Hard-cache some IMAP FETCH-related tokens
• cfe6dba Always include the VERSION block in NTLM messages.
• cfa66e4 Convert more async IMAP methods to ValueTask
• Additional commits viewable in compare view

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