build(deps-dev): bump eslint from 6.7.2 to 6.8.0

Bumps [eslint](https://github.com/eslint/eslint) from 6.7.2 to 6.8.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](eslint/eslint@v6.7.2...v6.8.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

yarn.lock

@@ -287,8 +287,8 @@ eslint-visitor-keys@^1.0.0, eslint-visitor-keys@^1.1.0:
   resolved "https://registry.yarnpkg.com/eslint-visitor-keys/-/eslint-visitor-keys-1.1.0.tgz#e2a82cea84ff246ad6fb57f9bde5b46621459ec2"
 
 eslint@^6.0.0:
-  version "6.7.2"
-  resolved "https://registry.yarnpkg.com/eslint/-/eslint-6.7.2.tgz#c17707ca4ad7b2d8af986a33feba71e18a9fecd1"
+  version "6.8.0"
+  resolved "https://registry.yarnpkg.com/eslint/-/eslint-6.8.0.tgz#62262d6729739f9275723824302fb227c8c93ffb"
   dependencies:
     "@babel/code-frame" "^7.0.0"
     ajv "^6.10.0"