move to more modern SVG read methods

src/svg_luminance_source.rs

@@ -1,6 +1,7 @@
 use crate::common::Result;
 use crate::{BufferedImageLuminanceSource, Exceptions, LuminanceSource};
 use image::{DynamicImage, RgbaImage};
+use resvg::usvg::TreeParsing;
 use resvg::{self, usvg::Options};
 
 pub struct SVGLuminanceSource(BufferedImageLuminanceSource);
@@ -58,12 +59,9 @@ impl SVGLuminanceSource {
             return Err(Exceptions::format_with("could not create pixmap"));
         };
 
-        resvg::render(
-            &tree,
-            resvg::usvg::FitTo::Original,
-            resvg::tiny_skia::Transform::default(),
-            pixmap.as_mut(),
-        );
+        let tree_resvg = resvg::Tree::from_usvg(&tree);
+
+        tree_resvg.render(resvg::tiny_skia::Transform::default(), &mut pixmap.as_mut());
 
         let Some(buffer) = RgbaImage::from_raw(tree.size.width() as u32, tree.size.height() as u32, pixmap.data().to_vec()) else {
         return Err(Exceptions::format_with("could not create image buffer"));