feat: update local nodejs and electron runtimes to v18

[deathaxe]

This PR...

1. updates NodeJS to 18.18.1
2. updates Electron to 26.4.0

[rchl]

There is also https://github.com/electron/electron/releases/tag/v27.0.0 which includes Node 18.17.1.

Note that I'm thinking of introducing some cleanup code for old versions so I might want to introduce all those changes together. Though I'm not sure how I'll do it yet.

[deathaxe]

Cleanup code might be something for both, the runtime handler and NpmClientHandler

[deathaxe]

Would need to be somewhat lazy as upon update older releases may still be running and therefore locked on Windows, so removing immediately might fail.

[rchl]

Package updates typically happen on startup and this cleanup would happen before servers are started so it wouldn't be an issue.

It could be an issue when triggering package update manually but then that already can be problematic so I wouldn't worry too much about that. It should correct itself on next start.

[jfcherng]

node.js v20 LTS is on its way by the end of this month btw. but there is no electron using it at this moment.

[rchl]

node.js v20 LTS is on its way by the end of this month btw. but there is no electron using it at this moment.

But I suppose it will take Electron quite a while to update to that.
Also, I would not want to do frequent updates of node runtime unless absolutely necessary so I'm fine with just sticking to 18 which should get only absolutely necessary updates (like security updates).