Add/Fix Project URLs

[stdedos]

https://packaging.python.org/en/latest/guides/distributing-packages-using-setuptools/#project-urls

    'Documentation': 'https://packaging.python.org/tutorials/distributing-packages/',
    'Say Thanks!': 'http://saythanks.io/to/example',
    'Source': 'https://github.com/pypa/sampleproject/',
    'Tracker': 'https://github.com/pypa/sampleproject/issues',

and also change

    url="https://github.com/reverbc/pylint-pytest",

to point here.