Chartify Versions Save

• Support PyYaml >= 5.2

• Reduce dependencies by replacing jupyter with ipython

• Updated Python to 3.6+ and Pandas to 1.0+ (Thanks @tomasaschan!)
• Updated Bokeh to 2.0+
• Removed colour dependency to fix setup errors.

Improvements:

• Updated default yaml loader to move off of deprecated method (Thanks @vh920!)
• Updated legend handling to adjust for deprecated methods in recent versions of Bokeh (Thanks for reporting @jpkoc)
• Updated license in setup.py (Thanks for reporting @jsignell)
• Bump base Pillow dependency to avoid insecure version.
• Update MANIFEST to include missing files (Thanks @toddrme2178!)

Bugfixes:

• Moved package requirements and fixed bug that occured with latest version of Bokeh (Thanks @emschuch & @mollymzhu!)
• Fixed bug in README while generating docs (Thanks @Bharat123rox!)

Improvements:

• Allows users to plot colors on bar charts that aren't contained in the categorical axis.

Bugfixes:

• Fixed bug that caused float types to break when plotted with categorical text plots (Thanks for finding @danela!)
• Fixed broken readme links.

Improvements:

• Added Radar Chart

Improvements:

• Added second Y axis plotting.
• Removed Bokeh loading notification on import (Thanks @canavandl!)
• Added support for custom Bokeh resource loading (Thanks @canavandl!)
• Added example for Chart.save() method (Thanks @david30907d!)

Bugfixes:

• Updated documentation for saving and showing svgs.
• Fixed bug that broke plots with no difference between min and max points. (Thanks for finding @fabioconcina!)

Improvements:

• Updated docstrings (Thanks @gregorybchris @ItsPugle!)
• Added SVG output options to Chart.show() and Chart.save() (Thanks for the suggestion @jdmendoza!)

Bugfixes:

• Fixed bug that caused source label to overlap with xaxis labels.
• Fixed bug that prevented x axis orientation changes with datetime axes (Thanks for finding @simonwongwong!)
• Fixed bug that caused subtitle to disappear with outside_top legend location (Thanks for finding @simonwongwong!)
• Line segment callout properties will work correctly. (Thanks @gregorybchris!)