Update dependency eslint-config-prettier to v6.15.0

Author: renovate-bot

package-lock.json

@@ -56,7 +56,7 @@
     "@typescript-eslint/parser": "2.27.0",
     "eslint": "6.8.0",
     "eslint-config-airbnb-typescript": "7.2.1",
-    "eslint-config-prettier": "6.10.1",
+    "eslint-config-prettier": "6.15.0",
     "eslint-plugin-import": "2.20.2",
     "eslint-plugin-jsx-a11y": "6.2.3",
     "eslint-plugin-prettier": "3.1.2",