Let's give bun a try

[bhousel]

Bun is a fast all-in-one JavaScript and TypeScript runtime and toolkit. docs

With the newly released Bun v1.3, I thought it would be good to try it out, and I like it. Here's why:

Not only is it significantly faster than other tools, it simplifies things a lot. It basically replaces:

• the runtime (node), it is mostly a drop-in replacement
• package manager (npm/yarn), and tools to check for updates like npm check or taze
  • and it has an option to avoid installing anything too new - mitigating JavaScript supply-chain attacks.
• bundler (esbuild/rollup/vite/parcel)
• test runner (jest/node:test/vitest)
• supports TypeScript natively, so we don't need tools like ts-node or a slow tsc transpilation step.
• supports monorepos (not used here but I do need this elsewhere)
• also has an enormous amount of other builtins, so a good opportunity to drop dependencies like
  • c8 for code coverage
  • shx for cross-platform shell commands
  • npm-run-all (this one is not really maintained anymore, I switched to npm-run-all2)

This commit also introduces some TypeScript. I'll probably migrate to TypeScript when I have some free time.

Bun has a builtin http server, so we can use it for local testing.
Just bun start or bun run start to test location-conflation on localhost.