Fix problem when reorder object of json file

[hoantran-it]

I think it is the same with the order of argument we pass in merge function. But if we place the new one first, result file will be reordered well. I faced this issue when I add new message and run script again. Correct me if I'm wrong :) Anyway, I really appreciate this tool so much, it help me a lot by saving time correcting message manually. Thank you!!

Files I generated. En is default language

en.json
{
"homePage_title": "Home page",
"homePage_slogan": "Slogan",
"topicPage_title": "Topic",
"topic_filter_recents": "Recents",
"topic_filter_favorites": "Favorites",
"reaction_feel": "Feel",
"homePage_testing": "testing",
"homePage_testing_2": "testing_2"
}

vi.json
{
"homePage_title": "",
"homePage_slogan": "",
"homePage_testing": "",
"homePage_testing_2": "",
"topicPage_title": "",
"topic_filter_recents": "",
"topic_filter_favorites": "",
"reaction_feel": ""
}

[akameco]

Thank you for your PR :)
I think en.json should be overridden with defaultMessage.

en.json

{
	"hello": "world"
}

messages.js

import { defineMessages } from 'react-intl'

export default defineMessages({
  hello: {
    id: 'hello',
    defaultMessage: 'new message'
  },
})

Run extract-react-intl-messages

en.json

{
	"hello": "new message"
}

But your point is right.
I changed to object key sort after merging.

[hoantran-it]

Great! Thank you :)