Handlebars helpers not being registered
Seems like the helpers are not being registered in handlebars. Code:

index.js:
```
app.use(views(viewPath, {
  map: {hbs: 'handlebars'},
  options: {
    helpers: {
      hello: (name) => {
        return "Hello " + name;
      }
    }
  }
}));
```

index.hbs:
```
<html>
<head><title>View Test</title></head>
<body>
<div>{{hello "Jerod"}}</div>
</body>
</html>
```

When accessing the page, it throws Error: Missing helper: "hello"

Regular handlebars templates work fine, I have tested it without helpers. 