chore(deps): update dependency eslint-config-prettier to v6.12.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
eslint-config-prettier	devDependencies	minor	6.11.0 -> 6.12.0

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Release Notes

prettier/eslint-config-prettier

### [`v6.12.0`](https://togithub.com/prettier/eslint-config-prettier/blob/master/CHANGELOG.md#Version-6120-2020-09-25) [Compare Source](https://togithub.com/prettier/eslint-config-prettier/compare/v6.11.0...v6.12.0) - Added: [@​typescript-eslint/comma-dangle]. Thanks to Masafumi Koba ([@​ybiquitous](https://togithub.com/ybiquitous))!!

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:tada: This PR is included in version 2.2.1 :tada:

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