Set correct wasm-bindgen version in Readme
@@ -26,7 +26,7 @@ $ cargo run --example hello_world --release
npm install -g http-server
# Install the wasm-bindgen tool
-cargo install -f wasm-bindgen@0.2.37
+cargo install -f wasm-bindgen@0.2.40
# Build the 'hello world' example to WebAssembly
cd examples/web/
