PNPM Support

[davemo]

For the most part scripty works just fine with pnpm, the only difference I've run into is the forwarding of command-line arguments does not work.

I suspect this is because with npm you have to explicitly use the -- to forward arguments, and with pnpm you do not.

I can submit a PR if you can point me in the right direction @jasonkarns - it wasn't obvious to me which part of the codebase I'd need to make a change in to support this 🤓

[davemo]

Seems it might be necessary to invoke a different lifecycle hook method 🤔 https://github.com/pnpm/pnpm/tree/main/exec/lifecycle#readme

[searls]

Thanks for raising this @davemo -- would welcome a PR! I haven't actually used scripty for several years or else I'd try to figure this out

[jasonkarns]

I would almost argue that pnpm should accept -- to separate pnpm args from its script args. That's a longstanding unix convention; even in cases where the -- is optional, it's still allowed. Not that scripty couldn't work around it, but seems a worthwhile feature request to pnpm anyway.