feat: Support Node.js v20

[privatenumber]

closes privatenumber/tsx#291

[privatenumber]

🎉 This PR is included in version 2.6.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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[Semigradsky]

@privatenumber JFYI In v20.6.0 initialize hook was added - https://nodejs.org/dist/latest-v20.x/docs/api/esm.html#initialize
It's avaialble in @types/node@20.6.x

From docs about globalPreload:

This hook will be removed in a future version. Use initialize instead. When a loader has an initialize export, globalPreload will be ignored.

[privatenumber]

I have a open PR for it (#72), but I'm still on the fence about how to approach it as it would require usage via --import instead of --loader.