Add #[wasm_bindgen(start)], plugins to webpack config, Update deps

examples/todomvc/src/lib.rs

@@ -63,7 +63,7 @@ fn app(name: &str) {
 }
 
 /// Entry point into the program from JavaScript
-#[wasm_bindgen]
+#[wasm_bindgen(start)]
 pub fn run() {
     console_error_panic_hook::set_once();
     app("todos-wasmbindgen");