chore(deps): update dependency eslint-config-prettier to v6.8.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
eslint-config-prettier	devDependencies	minor	6.7.0 -> 6.8.0

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Release Notes

prettier/eslint-config-prettier

### [`v6.8.0`](https://togithub.com/prettier/eslint-config-prettier/blob/master/CHANGELOG.md#Version-680-2019-12-25) [Compare Source](https://togithub.com/prettier/eslint-config-prettier/compare/dcca556e260af985ece4d9af92531fa649268f80...v6.8.0) - Added: [@​typescript-eslint/no-extra-semi]. Thanks to [@​xcatliu](https://togithub.com/xcatliu)!

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[codecov[bot]]

Codecov Report

Merging #180 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #180   +/-   ##
=======================================
  Coverage   71.76%   71.76%           
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  Files           3        3           
  Lines          85       85           
  Branches       19       19           
=======================================
  Hits           61       61           
  Misses         24       24

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