Avoid autodocsumm 0.2.0 and update documentation build dependencies

[bouweandela]

Closes #1793. I also updated the dependencies needed for building the documentation so they match what is in setup.py.

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Tasks

• Create an issue to discuss what you are going to do, if you haven't done so already (and add the link at the bottom)
• Give this pull request a descriptive title that can be used as a one line summary in a changelog
• Circle/CI tests pass. Status can be seen below your pull request. If the tests are failing, click the link to find out why.
• Preferably Codacy code quality checks pass, however a few remaining hard to solve Codacy issues are still acceptable. Status can be seen below your pull request. If there is an error, click the link to find out why. If you suspect Codacy may be wrong, please ask by commenting.
• Documenation builds on readthedocs

[stefsmeets]

I tested this on #1648 and the documentation now builds correctly. I can't say much about the added dependencies.

[bouweandela]

@stefsmeets Thanks for reviewing!