Support macOS Monterey and bug fixes.

* Support macOS Monterey.
* Bug fix: Sounds Effect feedback was no longer working.
* Minor internal changes.

Minor updates.

* Fix application icons.
* Fix copyright year.

Support Apple Silicon Mac and macOS Big Sur.

* Support Apple Silicon Mac and macOS Big Sur.
* Update icon.
* Add Korean localization.
* Update dependencies.

Bug fixes and improvements.

* Bug fix: Notification center swipe gesture stops working. (#36)
* Update Japanese localization format. (#32)
* Update traditional Chinese localization.
* Add "About" panel.
* Internal beauty.

Minor updates.

 * Support macOS 10.14 Mojave.

Minor updates.

 * Support MacBook Pro (2018) (#23).
 * Internal beauty.

Minor updates.

 * Add section title for haptic feedback strength.
 * Update menu item label and translations.

Minor updates.

* Add a feature to hide the application icon in the menu bar.

Minor updates.

* Support software update.
* Internal beauty.

Bump version.