Type in the README header

unless it's intended to be create-wasm-(web)app :)

Author: aaronabramov

Diff for: README.md

@@ -1,6 +1,6 @@
 <div align="center">
 
-  <h1><code>create-wasm-wapp</code></h1>
+  <h1><code>create-wasm-app</code></h1>
 
   <strong>An <code>npm init</code> template for kick starting a project that uses NPM packages containing Rust-generated WebAssembly and bundles them with Webpack.</strong>