v2.23.0 MC 1.21.1, 1.21, 1.20.6
I only list the primary changes here. For information on API changes, internal changes, and changes to the language files, you can find the complete changelog on Github: https://github.com/Shopkeepers/Shopkeepers/blob/master/CHANGELOG.md

• Update for MC 1.21.1.
• Drop support for MC versions below 1.20.6 to update the plugin to use Java 21 and build against a more modern API version. If you want to run this plugin on an older server version, you need to use an older plugin version.
• Item display name and lore data from the language file can be specified as Json text now. Other text does not yet support the Json format.
• Fix: Color codes in text (e.g. from the language file) did not reset formatting.
• Fix: Item data containing attribute modifiers was not correctly saved to the plugin config and failed to load.
• Extend the item stack we use for server assumption tests to include newer item data.
• Update the compatibility mode.

Known potential issues: See here.

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Thanks!