Bumping `mailparse` crate about maildir

[soywod]

Because I am using both mailparse and maildir in my project, and it creates some conflicts:

error[E0308]: mismatched types
   --> src/domain/envelope/maildir/envelope.rs:46:61
    |
46  |                     let addrs = mailparse::addrparse_header(h)
    |                                 --------------------------- ^ expected struct `MailHeader`, found struct `mailparse::MailHeader`
    |                                 |
    |                                 arguments to this function are incorrect
    |
    = note: expected reference `&MailHeader<'_>`
               found reference `&mailparse::MailHeader<'_>`
    = note: perhaps two different versions of crate `mailparse` are being used?