message: enable cache by default in imagick
diff: @@ -14,6 +14,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/).
  - `site.copy()` now accepts an array of file extensions to copy.
  For example: `site.copy([".jpg", ".png"])`.
  +### Changed
  +- The `imagick` plugin has the `cache` option as `true` by default.
  +
  ### Deprecated
  - The functions `site.loadPages()`, `site.loadAssets()`, `site.loadComponents()`.
  Use the new `site.load()` function:
  