chore: use svg's to keep repo size smaller

Signed-off-by: Henry Gressmann <mail@henrygressmann.de>

Author: explodingcamera

README.md

@@ -18,7 +18,7 @@
 I'm currently working on supporting the WebAssembly MVP (1.0) specification. You can see the current status in the graph below. The goal is to support all the features of the MVP specification and then move on to the next version.
 
 <p align="center">
-  <img align="center" src="./crates/tinywasm/tests/progress-mvp.png" width="700" alt="">
+  <img align="center" src="./crates/tinywasm/tests/progress-mvp.svg" width="700" alt="">
 </p>
 
 ## Features

crates/tinywasm/tests/charts/progress.rs

@@ -36,7 +36,7 @@ pub fn create_progress_chart(csv_path: &Path, output_path: &Path) -> Result<()>
     println!("versions: {:?}", versions);
     println!("data: {:?}", data);
 
-    let root_area = BitMapBackend::new(output_path, (1000, 400)).into_drawing_area();
+    let root_area = SVGBackend::new(output_path, (1000, 400)).into_drawing_area();
     root_area.fill(&WHITE)?;
 
     let mut chart = ChartBuilder::on(&root_area)

crates/tinywasm/tests/mvp.rs

@@ -10,7 +10,7 @@ fn generate_charts() -> Result<()> {
     // Create a line chart
     charts::create_progress_chart(
         std::path::Path::new("./tests/mvp.csv"),
-        std::path::Path::new("./tests/progress-mvp.png"),
+        std::path::Path::new("./tests/progress-mvp.svg"),
     )?;
 
     // // Create a bar chart