mail/notmuch: Update to 0.34

Notmuch 0.34 (2021-10-20)
=========================

General
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An optional new s-expression based query parser is available if
notmuch is built with the `sfsexp` library. See
notmuch-sexp-queries(7) for syntax, and use `notmuch config get
built_with.sexpr_query` to check if notmuch is compiled with
s-expression query support.

CLI
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Support multiple `Delivered-To` headers in notmuch-reply(1).

Emacs
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Functions are now allowed in `notmuch-search-result-format`.

Improvements to unthreaded view on large threads.

Tolerate bad/missing working directory for most commands.

Allow customization of tree drawing symbols in notmuch-tree mode.