Update and remove dependencies

[Starmania]

Closes #95

Switch to fs.promise
Drop Rimraf
Drop electron-window-state types (already included in the main package)
Drop Node types (included by node itself)
Move CONTRIBUTING to it's own file
Adopt Node 20 module/resolution and bump target to ES2022 (CJS/ESM compat)

[CLAassistant]

All committers have signed the CLA.

[pimterry]

Thanks @Starmania! This is definitely helpful. Happy to upgrade TS as well too, if it doesn't break anything, go for it 👍

[Starmania]

I will write more changes and checks

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	typescript@​4.7.4 ⏵ 5.9.3	+1		-10		+10
	semver@​7.5.4 ⏵ 7.7.3	+1		+1
	electron-store@​8.0.0 ⏵ 11.0.2	+1		+1	+20

View full report

[pimterry]

Nice work, thanks @Starmania! Merged 👍

As noted in your contributing docs, it was tricky building this due to the signing config, and that's why there were no tests on this CI either. I've just changed the build setup so that now builds do run (with signing disabled) and force pushed to enable that here, with a couple of related tweaks.

By the way, in case you're not aware, HTTP Toolkit Pro is free for all contributors to all https://github.com/httptoolkit repos. If that would be useful, just let me know your email (either here or by sending a message to opensource @ httptoolkit.com) and I'll set you up with an account.