build(deps-dev): bump eslint-config-prettier from 6.8.0 to 6.9.0

Bumps [eslint-config-prettier](https://github.com/prettier/eslint-config-prettier) from 6.8.0 to 6.9.0.
- [Release notes](https://github.com/prettier/eslint-config-prettier/releases)
- [Changelog](https://github.com/prettier/eslint-config-prettier/blob/master/CHANGELOG.md)
- [Commits](prettier/eslint-config-prettier@v6.8.0...v6.9.0)

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

Author: dependabot-preview[bot]

yarn.lock

@@ -231,8 +231,8 @@ eslint-config-not-an-aardvark@^2.1.0:
   resolved "https://registry.yarnpkg.com/eslint-config-not-an-aardvark/-/eslint-config-not-an-aardvark-2.1.0.tgz#71e5fb7c43b64abb4632ef144aad6cceef520195"
 
 eslint-config-prettier@^6.0.0:
-  version "6.8.0"
-  resolved "https://registry.yarnpkg.com/eslint-config-prettier/-/eslint-config-prettier-6.8.0.tgz#36bd7559dcef9f97d7596779b38e6a879abb89d3"
+  version "6.9.0"
+  resolved "https://registry.yarnpkg.com/eslint-config-prettier/-/eslint-config-prettier-6.9.0.tgz#430d24822e82f7deb1e22a435bfa3999fae4ad64"
   dependencies:
     get-stdin "^6.0.0"