chore(deps): update dependency eslint-config-prettier to v6.15.0

Author: renovate-bot

package.json

@@ -63,7 +63,7 @@
     "chromatic": "5.2.0",
     "copyfiles": "2.2.0",
     "eslint": "6.8.0",
-    "eslint-config-prettier": "6.11.0",
+    "eslint-config-prettier": "6.15.0",
     "eslint-plugin-jest": "23.11.0",
     "eslint-plugin-prettier": "3.1.3",
     "eslint-plugin-promise": "4.2.1",