Breaking changes
* shinyswatch now requires shiny v1.0.0 or newer to use the newly-introduced `shiny.ui.Theme()` class to define themes. As a result, `shinyswatch.theme.{name}` objects can no longer be added anywhere in the app's UI. Instead, pass a shinyswatch theme to the `theme` argument of any `shiny.ui.page_*()` functions (Shiny Core) or to `shiny.express.ui.page_opts()` (Shiny Express). (39)
* The `default` argument of `theme_picker_ui()` is now deprecated. Instead, pass the initial theme to the `theme` argument of any `shiny.ui.page_*()` functions (Shiny Core) or to `shiny.express.ui.page_opts()` (Shiny Express). This change separates the initial theme selection from the placement of the theme picker input. (39)
* `shinyswatch.get_theme_deps()` was removed from the package. If needed, use the `._html_dependency()` method of the theme object. (39)
New features
* As mentioned above, shinyswatch now uses the `shiny.ui.Theme()` class to define themes, making shinyswatch themes customizable using the `.add_defaults()`, `.add_rules()` and other methods of the `shiny.ui.Theme()` class. Customized themes are recompiled from Sass to CSS, which requires the [libsass package](https://sass.github.io/libsass-python/). (#39)
* The theme picker now includes Shiny's default theme (as `"shiny"`) and bare Bootstrap (as `"bootstrap"`) as theme options, in addition to the Bootswatch themes. If the initial app theme is a custom `shiny.ui.Theme()`, the custom theme is also included in the theme picker options. (39)
* The theme picker will now remember the previous theme selection between app uses when the app is re-loaded in the same browser. (43)