Features
Update to Vue 3.0.3 and support latest <script setup> RFC: #305
Note: between Vue 3.0.2 and 3.0.3 the <script setup> implementation changed significantly. It is listed under "Experimental Features" on release docs: https://github.com/vuejs/vue-next/blob/master/CHANGELOG.md#experimental-features. So, if you are using this and you find a bug, please report it.