Changes:
- #5033: uses rollup to bundle monaco-editor's monaco.d.ts
- #5042: uses ts instead of js
- #5041: Bump brace-expansion in /website
- #5034: Uses npm for website, hosts playground runner on https://isolated-playground.github.io for better isolation.
- #5036: Turns on formatOnSave
- #5035: Removes filler
This list of changes was auto generated.