Add Turbo color scheme

[maherma-adg]

Add a forgotten color scheme defined on d3-scale-chromatic.

[coveralls]

Pull Request Test Coverage Report for Build 342

• 0 of 2 (0.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 42.294%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/helpers.js	0	2	0.0%
<!--	Total:	0	2

Totals
Change from base Build 332:	0.0%
Covered Lines:	185
Relevant Lines:	410

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💛 - Coveralls