The remaining two were core::str::FromStr and
alloc::collections::BTreeMap.
Note that this doesn’t allow us to be no_std yet.
skip-changelog: This isn’t in any way user-visible, except that some
structs are now slightly smaller.
This introduces a breaking change by moving from a bool to an
Option<NoCertManagement>, which will be reverted eventually once we add
support for #[xml(flag)] types of children.
Let’s continue reexporting jid and minidom, but not their inner pub
items, users of this crate can go one level deeper if they need that.
Only xso::error::Error is still useful to reexport, as this is part of
the public API of all of our parsers.