Extract with format minimal does not set defaults

[disintegrator]

When the extract format is set to minimal, the extract command is not correctly setting the default message for the source locale. It does however work fine when the format is set to lingui

Given:

<Trans id="userpage.tabs.items">Items</Trans>

Command:

yarn lingui extract

Output (locale/en/messages.json):

{
  "userpage.tabs.items": "userpage.tabs.items"
}

Expected:

{
  "userpage.tabs.items": "Items"
}

Config including package versions (extract from my package.json):

{
  "dependencies": {
    "@lingui/react": "^2.0.8",
    "react": "^16.4.0",
    "react-dom": "^16.4.0"
  },
  "devDependencies": {
    "@lingui/babel-preset-react": "^2.0.8",
    "@lingui/cli": "^2.0.8",
  },
  "lingui": {
    "fallbackLocale": "en",
    "sourceLocale": "en",
    "localeDir": "<rootDir>/locale",
    "format": "minimal",
    "srcPathIgnorePatterns": [
      "/node_modules/",
      "<rootDir>/\\.next/",
      "<rootDir>/dist/",
      "<rootDir>/geolite2-country/"
    ]
  }
}

[vsnig]

It can be fixed editing one string as I described in #199 (starting at "And this leads to another issue..."). #212 and #141 (comment) have similar complaints.
@tricoder42 should I create a PR?

[disintegrator]

I agree with your suggested fixes in #199 @snegostup.

[tricoder42]

@snegostup Sure, go for it! 👍

[tricoder42]

Fixed and released in v2.2.0. Thanks to all involved!