added prettier plugin to package.json, CI test fix

Author: truittjanney

package.json

@@ -123,6 +123,9 @@
       "@react-native",
       "prettier"
     ],
+    "plugins": [
+      "prettier"
+    ],
     "rules": {
       "react/react-in-jsx-scope": "off",
       "prettier/prettier": [