🚿 Remove exec-sync dependency

[quilicicf]

Hi,

I'm creating this PR because the original maintainer never merged this PR.

I saw you forked his project and I thought you're probably my best chance to get rid of my security warning, plus fixing the Windows part is something I tried (and failed) to do.

Thanks for your time

[quilicicf]

Side note: there's no package-lock.json in the repo.
It might be good to add one.
I didn't do so in my original PR to make it easier to merge but I can add it if it helps.

[notatestuser]

Hey, thanks for this, if you could add a package-lock.json I would very much appreciate it. Thank you!

[quilicicf]

Here you are!