Fix visible deprecation warning, pkg_resources deprecation

[frank1010111]

This should fix #174 and the rejuvenated discussion around #144 (comment). In testing that, I found that pkg_resources was deprecated and failing, so I replaced that code with a pathlib equivalent.

A minimal test is

import pandas as pd
import sweetviz as sv
iris = pd.read_csv('https://raw.githubusercontent.com/mwaskom/seaborn-data/master/iris.csv')
report = sv.analyze(iris)
report.show_html()