New features:
- DiscreteHeatmapPlotter
- Used for visualizing matrices. For example, if used with a correlation matrix it can provide a useful way to quickly visualise correlated traits
- Colorbar
- Various new options for greater control for image plotter; such as the option to set min/max values, a label, and its position
**Full Changelog**: https://github.com/RFogarty1/pyplotterlib/compare/v1.1.0...v1.2.0