chore(deps): update dependency imagemin-svgo to v8

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
imagemin-svgo	dependencies	major	^7.1.0 -> ^8.0.0

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Release Notes

imagemin/imagemin-svgo

### [`v8.0.0`](https://togithub.com/imagemin/imagemin-svgo/releases/v8.0.0) [Compare Source](https://togithub.com/imagemin/imagemin-svgo/compare/v7.1.0...v8.0.0) - Require Node.js 10 ([#​40](https://togithub.com/imagemin/imagemin-svgo/issues/40)) [`fa899fc`](https://togithub.com/imagemin/imagemin-svgo/commit/fa899fc)

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