Make style tags optional

[Michael Olofinjana]

You shouldn't have to declare style tags if you don't want to.
When using optional style tags, the compiler assumes you're writing css and wraps everything between the backtildes in one style tag.

Current Way:

/** @VueLiteralCompiler Styles */
const styles = `
  <style>
    p {
      font-size: 1.2em;
    }
  </style>
`;

Proposed:

/** @VueLiteralCompiler Styles */
const styles = `
  p {
    font-size: 1.2em;
  }
`;