​​Use esbuild with webpack to transform #js and #ts code.

esbuild is by far one of the fastest TS/ESNext to ES6 compilers, so it makes sense to use it over Babel/TSC with webpack to take advantage of both worlds (Speed and the webpack ecosytem).

Why is it fast? Several reasons:

- It's written in #go, a language that compiles to native code
- Parsing, printing, and source map generation are all fully parallelized
- Everything is done in very few passes without expensive data transformations
- Code is written with speed in mind, and tries to avoid unnecessary allocations

https://github.com/egoist/esbuild-loader