[Canvas] Support for data marks

[techniq]

Until the infinite loop issue is resolved, which is needed to handle multiple primitives in an {#each} loop, it would still be helpful to add canvas support where all the drawing can be handled in a single render, for example in GeoPath or Points

• Area
• Bars
• Points
• Spline
• GeoPath

[techniq]

#295 added support for all common data mark components (listed above) and also fixed the infinite loop issue which allowed primitive component support (Arc, Line, Rect, etc)