Please refer to igraph instead of python-igraph

[szhorvat]

Please refer to igraph instead of python-igraph in the following locations:

https://github.com/KenLauLab/pCreode/blob/master/setup.py#L14
https://github.com/KenLauLab/pCreode/blob/master/requirements.txt#L6

Please see igraph/python-igraph#699 for an explanation.

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Additionally, most of the igraph-related troubleshooting information in the README is outdated, and can now be removed. For the majority of users, installing igraph is as simple as pip install igraph, as binary wheels have been provided for all common platforms for a couple of years now.

Note that with Conda one still needs to use conda install python-igraph (not igraph).

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Finally, I would strongly recommend not constraining the igraph version to 0.9, as 0.10 brings quite a few bugfixes and robustness improvements. If you are unsure about some changes in 0.10, feel free to post on the forum or open an issue. Behaviour changes are typically the result of bugfixes.