Fix: Use VcardBuilder instead of Vcard itself
Fix: Use VcardBuilder instead of Vcard itself

The current implementation does not panic on VcardBuilder::build(), so
we unwrap() that directly.

Should be fixed in future versions of either rust-vobject or here, so
that we error appropriately.

Signed-off-by: Matthias Beyer <1d6e1cf70ec6f9ab28d3ea4b27a49a77654d370e@beyermatthias.de>

matthiasbeyer/imag,matthiasbeyer/imag