Switch to undici Agent for HTTPS requests

[in-voker]

Replace https.Agent with undici's Agent for handling self-signed certificates.

Hello and thank you for wanting to contribute to the MagicMirror² project!

Please make sure that you have followed these 3 rules before submitting your Pull Request:

1. Base your pull requests against the develop branch.
2. Include these infos in the description:

• Does the pull request solve a related issue?
  no

• If so, can you reference the issue like this Fixes #<issue_number>?
• What does the pull request accomplish? Use a list if needed.
  allow the selfSignedCert: true flag in calenders array to work

• If it includes major visual changes please add screenshots.

3. Please run node --run lint:prettier before submitting so that
   style issues are fixed.

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[KristjanESPERANTO]

Thanks for addressing this! 🙂 I think your approach using undici's Agent with the dispatcher option is the right way to go 👍

Please handle the linter issues. And optinal but nice to have: Could you add a test case verifying that self-signed certificates work correctly with the new implementation?

[khassel]

@KristjanESPERANTO When I search for node:https in the project, I get two more hits. Shouldn't that be changed as well?

[KristjanESPERANTO]

When I search for node:https in the project, I get two more hits. Shouldn't that be changed as well?

I had a look. The other two uses should remain unchanged:

1. js/server.js: Creates an HTTPS server (receives connections) - this is unrelated to undici. https.Server is the correct API for creating servers.

2. clientonly/index.js: Uses the old callback-based https.get() API - not using fetch(). We should refactor this on occasion, but that is unrelated to this PR.

[KristjanESPERANTO]

@in-voker Thanks again for this improvement! It will be in the next release 🙂

[sdetweil]

There are other modules that need the same fix