Bump eslint-config-prettier from 4.3.0 to 6.15.0

Bumps [eslint-config-prettier](https://github.com/prettier/eslint-config-prettier) from 4.3.0 to 6.15.0.
- [Release notes](https://github.com/prettier/eslint-config-prettier/releases)
- [Changelog](https://github.com/prettier/eslint-config-prettier/blob/main/CHANGELOG.md)
- [Commits](prettier/eslint-config-prettier@v4.3.0...v6.15.0)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

package-lock.json

@@ -47,7 +47,7 @@
     "babel-jest": "^24.3.1",
     "eslint": "^5.16.0",
     "eslint-plugin-import": "^2.8.0",
-    "eslint-config-prettier": "^4.2.0",
+    "eslint-config-prettier": "^6.15.0",
     "eslint-plugin-prettier": "^3.0.1"
   },
   "appium": {