Bump eslint-config-prettier from 6.3.0 to 6.9.0 (#61)

Bumps [eslint-config-prettier](https://github.com/prettier/eslint-config-prettier) from 6.3.0 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](https://github.com/prettier/eslint-config-prettier/compare/v6.3.0...v6.9.0)

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

package.json

@@ -48,7 +48,7 @@
     "copyfiles": "^2.1.0",
     "css-loader": "^3.4.0",
     "eslint": "^6.8.0",
-    "eslint-config-prettier": "^6.3.0",
+    "eslint-config-prettier": "^6.9.0",
     "eslint-plugin-jest": "^23.2.0",
     "eslint-plugin-prettier": "^3.1.2",
     "eslint-plugin-react": "^7.17.0",