No 'watch' compiler option in V2 tsconfig documentation

[ghost]

I searched Issues to see if this had been mentioned previously, and found this quote in the "Update" issue:

Having a data-dump is a good first start, but some of these flags are obviously CLI only, for example: "help" or "watch" and the graph of these options is quite complex but not represented in the TypeScript codebase.

To map these domains, there is a file called tsconfigRules.ts which strives to be the source of truth for how the config options connects and their additional metadata.

Originally posted by @orta in #130 (comment)

However, watch is a valid option in tsconfig.json as part of the compilerOptions.

[orta]

Yeah, and it's changed a bunch in 3.8, I'd like to add them back in - yep 👍

[orta]

These are in now