message: fixing broken link in README
  [skip ci]
diff: @@ -13,7 +13,7 @@ Tone.js is a Web Audio framework for creating interactive music in the browser.
  # Installation
  -* download [full](https://tonejs.github.io/build/Tone.js) | [min](https://tonejs.github.io/build/Tone.min.js)
  +* [download](https://unpkg.com/tone)
  * `npm install tone`
  * dev -> `npm install tone@next`
  