Biome vs. Prettier & ESLint; ESLint flat config improvements; returning from async functions;

[Quoting the blog post:]

[...] we were consistently hearing the same three pieces of feedback [for the new configuration system]:

• Use with TypeScript was clunky.
• It was difficult and frustrating to extend other configurations.
• Global ignores are confusing.

• npm init --init-type specifies the value for property "type" in package.json.
• Managing the npx cache via npm cache npx.
• If a package version is specified when using npx, the cache is updated if possible.
• Warning if an CLI flag or a config option is unknown