mail/notmuch: Update to 0.34

Notmuch 0.34 (2021-10-20)

General

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

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

Emacs

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.