Update lib.rs (#2480)

Updates call to .set_text_content, now take an Option<&str> instead of &str.

Author: drhodes

examples/dom/src/lib.rs

@@ -11,7 +11,7 @@ pub fn run() -> Result<(), JsValue> {
 
     // Manufacture the element we're gonna append
     let val = document.create_element("p")?;
-    val.set_text_content("Hello from Rust!");
+    val.set_text_content(Some("Hello from Rust!"));
 
     body.append_child(&val)?;