Shinyswatch

* Update bootswatch themes. (24)

New features

* Drop XStatic-bootswatch dependency

New features

* Update themes to support Bootstrap 5.3 (20)

Bug fixes

* Actually include the new ion range slider files in the package (18).

New features

* Added `shinyswatch.theme_picker_ui()` and `shinyswatch.theme_picker_server()` to allow users to select a theme from a dropdown menu. When changing themes, a page refresh will occur (11).

Bug fixes

* Updated themes to support latest shiny sidebars. Requires shiny 0.5.0 or later (15).

* Dropped support for python 3.7 as shiny does not support python 3.7 (16).

Bug fixes

* Added return types to `theme()` methods. (6)

* Update bootswatch themes. (8b80ed0)