Update dependency prettier to v2.3.1

Author: renovate-bot

package-lock.json

@@ -49,6 +49,6 @@
     "eslint": "7.18.0",
     "eslint-config-prettier": "7.2.0",
     "eslint-plugin-prettier": "3.3.1",
-    "prettier": "2.2.1"
+    "prettier": "2.3.1"
   }
 }