Update dependency sugarss to v3

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
sugarss	devDependencies	major	^2.0.0 -> ^3.0.0

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Release Notes

postcss/sugarss

### [`v3.0.0`](https://togithub.com/postcss/sugarss/compare/2.0.0...3.0.0) [Compare Source](https://togithub.com/postcss/sugarss/compare/2.0.0...3.0.0)

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Renovate configuration

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[coveralls]

Coverage remained the same at 76.0% when pulling 01396d757799fa306020d62ac0920783097a9c6d on renovate/sugarss-3.x into 1c3ebba359cc4702c2094b1a28ef5a678e930dc6 on master.