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PR: Update `readthedocs` config to version 2 #190

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Job	Run time
Linux Py3.7 - pyqt5	3m 42s
Linux Py3.7 - pyside2	3m 36s
Linux Py3.10 - pyqt5	3m 29s
Linux Py3.10 - pyside2	3m 26s
	14m 13s