Add SeleniumBase "Chart Maker" for creating pie charts

[mdmintz]

Add SeleniumBase "Chart Maker" for creating pie charts

SeleniumBase Chart Maker allows you to create HTML charts with Python.

The HighCharts library is used for creating charts.
(Currently only pie charts are supported.)

Here's a sample chart:

(Click on the image for the actual chart)

Here's how to run the example (a chart in a presentation):

cd examples/chart_maker
pytest my_chart.py

Other changes included in this release:

• Update SeleniumBase Tours
• Update Python dependencies:
  ** parso==0.7.1
  ** coverage==5.2.1
  ** rich==4.1.0
  ** allure-pytest==2.8.17
  ** pdfminer.six==20200726