Function update_metadata 

pub fn update_metadata(
    flo_data: &[u8],
    new_metadata: &[u8],
) -> Result<Vec<u8>, JsValue>

update metadata without re-encoding audio

Arguments

• flo_data - Original flo™ file bytes
• new_metadata - New MessagePack metadata bytes (use create_metadata_*)

Returns

New flo™ file with updated metadata