jotdown_wasm: display version

mostly useful for the hosted version

examples/jotdown_wasm/src/lib.rs

@@ -3,6 +3,12 @@ use wasm_bindgen::prelude::*;
 use jotdown::Render;
 use std::fmt::Write;
 
+#[must_use]
+#[wasm_bindgen]
+pub fn jotdown_version() -> String {
+    include_str!(concat!(env!("OUT_DIR"), "/version")).to_string()
+}
+
 #[must_use]
 #[wasm_bindgen]
 pub fn jotdown_render(djot: &str) -> String {