title: await is a reserved word
body: <p>I have follow code that should fetch data asynchrony:</p>
  
  <pre><code>  methods : {
      btn() {
        console.log("Hello");
        var url = "https://jsonplaceholder.typicode.com/users";
        let mydata = await fetch(url);
        console.log(mydata);
      }
    }
  </code></pre>
  
  <p>And I am getting error:
  <code>Module build failed: SyntaxError: D:/app3/src/App.vue: await is a reserved word (19:19)</code></p>