Update dependency eslint-config-prettier to v6.6.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
eslint-config-prettier	devDependencies	minor	6.5.0 -> 6.6.0

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Release Notes

prettier/eslint-config-prettier

### [`v6.6.0`](https://togithub.com/prettier/eslint-config-prettier/blob/master/CHANGELOG.md#Version-660-2019-11-17) [Compare Source](https://togithub.com/prettier/eslint-config-prettier/compare/v6.5.0...v6.6.0) - Added: New [eslint-plugin-vue] rules: [vue/dot-location] and [vue/keyword-spacing]. Thanks to [@​xcatliu](https://togithub.com/xcatliu)!

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