Changes in grainyhead-0.2.1 (2023-03-22)
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  * Fix incorrect handling of dates in --from and --to options.


Changes in grainyhead-0.2.0 (2023-01-18)
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  * Add cache control option (`--caching=...`).
  * Purge duplicated items when refreshing the cache.
  * Support complex selectors with binary operators (&, |, and ^) and
    parenthesised expressions.
  * Rename the executable to `grainyhead`.
