Function blend_multiple_js

pub async fn blend_multiple_js(
    image_files: JsValue,
    target_file_name: String,
    algorithm: Option<String>,
    algorithms: Option<Vec<JsValue>>,
    is_inline: Option<bool>,
    options: JsValue,
) -> Result<File, JsValue>

Blends multiple Files into one, named target_file_name, using algorithm and the extra options given. Algorithm defaults to BlendAlgorithm::Multiplicative.