Make testing and developing of the markdown-rs dependency easier

src/main.test.rs

@@ -0,0 +1,12 @@
+#![allow(clippy::single_match)]
+
+fn main() -> Result<(), markdown::message::Message> {
+    env_logger::init();
+
+    println!(
+        "{:?}",
+        markdown::to_mdast("::test:", &markdown::ParseOptions::default())?
+    );
+
+    Ok(())
+}