[BREAKING CHANGE] Update Major Release to Align with D3 v5

[tomwanzek]

Remove:

• d3-queue

Add:

• d3-contour
• d3-scale-chromatic

Change:

• d3-scale to major release

• [x] Update dependencies

• [x] Update module re-export barrel

• [x] Update Interface/Type re-exports

• [x] Update README (scope of included packages, change references from request to fetch vs httpClient)

• [x] Update package.json keywords (included D3 modules)