ReadTheDocs: fixup and get a successful render #1337
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ReadTheDocs uses a very old (1.x) Sphinx, but we're using a 3.x. In order to update it, we have to create a requirements.txt and point RTD to it with a file in the root of the project. A bit ugly, but at least we can do it! (Though it'd be cool if they supported pyproject / poetry.)
To keep the requirements.txt consistent, CI now verifies that it matches the poetry.lock (and also that poetry.lock is up to date with pyproject.toml.)