[dev] Update dependency prettier to v2

Author: renovate-bot

package-lock.json

@@ -56,7 +56,7 @@
     "eslint-plugin-react-native": "3.9.1",
     "eslint-plugin-sort-imports-es6-autofix": "0.5.0",
     "metro-react-native-babel-preset": "0.63.0",
-    "prettier": "1.19.1"
+    "prettier": "2.1.1"
   },
   "dependencies": {
     "lodash": "^4.17.15"