Support for pnpm

[glenn-vandeputte]

I wanted to add release-it to a repo which uses pnpm instead of npm, but it fails because at the end of the script it is hardcoded to do npm install --save-dev release-it.

Could this be made configurable so it could be pnpm add --save-dev? Or auto detect it the same way the github or gitlab remote repo is detected? I'm happy to make a PR if I get some indication wether this is something which you want implemented.

[webpro]

Only now I see there's also #2 🙈 If I merge that, is that something we could work with?

[webpro]

Feel free to take your own stab at it btw, happy to receive PR(s)

[glenn-vandeputte]

Ok I completely missed that PR 🙈 . I guess that would work indeed.

[webpro]

Just tried the PR, doesn't work, perhaps we can use e.g. https://github.com/antfu-collective/package-manager-detector for this.