Upgrade node 18 -> 20

[xmunoz]

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• What are we trying to do?
  Upgrade node to the current LTS version. We are currently on 18, which is in maintenance.

• What feature or behavior is this required for?
  Keeping things up to date!

• How could we solve this issue? (Not knowing is okay!)
  By upgrading to node 20.

• Anything else?