Fixed the external stream suite on time-skipping and the pydoctor build. - #102

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Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065, arduino/setup-protoc@c65c819552d16ad3c9b72d9dfd5ba5237b9c906b. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/