Allow interpolation in inline style tags

[NullVoxPopuli]

Enables use of {{ }} in scoped styles:

// ...

const padding = '20';

<template>
  <div class='hello-class'>
    <b>Hello</b>, world!
  </div>

  <style scoped inline>
    .hello-class {
      font-size: {{padding}}px;
    }

    b {
      color: blue;
    }
  </style>
</template>

NOTE: -- {{ }} will really only work for values right now

Failure is real, yet confusing, because this works in the REPL

[NullVoxPopuli]

this incorrect, which hints at babel not detecting the scope usage