Regenerate language pack when file references have changes

[ocean90]

Issue Overview
For JSON files it's important that the file name matches the current reference of the string otherwise the JSON files cannot be found by WordPress. Because a reference change isn't detected as a change to the translation itself no new language pack is build thus shipping the JSON files with the previous reference.

To Reproduce
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1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
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Versions

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• PHP:
• WP-CLI:
• GlotPress:
• WordPress:

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