Update changelog for 3.2.0 release (kolide#2324)

Update changelog for 3.1.0 release (kolide#2278)

Update go.sum (kolide#2267)

Update CHANGELOG for 2.6.0 release (kolide#2210)

Update changelog for 2.5.0 release. (kolide#2189)

Update changelog for 2.4.0 release (kolide#2149)

Fix link flags for version information in binaries (kolide#2099)

Update changelog for 2.2.0 release (kolide#2078)

Merge pull request from GHSA-6g7f-8qm4-f7h8

When LOGIN authentication was used, Fleet would send SMTP credentials
even if the connection the SMTP server was not secured via TLS.

Copying the pattern used in the standard library PlainAuth
implementation, we now only send credentials when the connection is
secure or the server is localhost.

Update changelog for 2.1.1 release (kolide#2036)