wrong requirement name dateutil in requierments.txt breaks update to latest version

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The package dateutil doesn't exist, the correct package name would be python-dateutil, this naming problem is causing problems when trying to install the latest version of quantstats, so for that reason when trying to install with pip install, pip will fall back, installing an older version of quantstats 0.0.50

how to replicate in a new clean virtual env

$ pip install quantstats -U --no-cache-dir # try to install the latest version
$ python
>>> import quantstats
>>> print(quantstats.__version___)
0.0.50

I would expect to get version number 0.0.53