Add an inspect option to enable debugging about ts-node-dev

[andrewrothman]

I was able to get the inspector working with ts-node-dev --inspect=127.0.0.1:9229 ./src/index.ts.

[wclr]

Interested in getting your thoughts @whitecolor. Happy to help with a PR with whatever you reckon is the right approach.

Unknown flags are treated like string flags by default. The right solution to avoid ambiguity is to separate script name from option flags with --.

ts-node-dev --inspect -- my-script.ts

Will add this in docs. Reopen if something wrong.

[jraoult]

@andrewrothman thanks for the insight. It would then mean this is a bug in the way ts-node-dev parses the arguments list.

Interested in getting your thoughts @whitecolor. Happy to help with a PR with whatever you reckon is the right approach.