2.0.0

• BREAKING Removes the possibility to pass ::stylefy/with-classes to use-style via options map (second argument of use-style). If you do this, a warning message is logged and the value is ignored. This feature has been marked as deprecated since version 1.3.0 (2018). If you have used ::stylefy/with-classes in options map, you can easily replace it with :class. Notice that passing ::stylefy/with-classes via style map (first argument of use-style) is still perfectly valid, this change is only related to the options map.
• :class in HTML attributes and :stylefy.core/with-classes in style map now support additional syntax: you can pass a string, a keyword or a vector of strings or keywords. You can also pass a vector of both keywords and strings if you wish. nil is also accepted and it will be ignored. Discussion: #44
• Adds basic support for Server-Side Rendering (SSR). This means that we can now use use-style on the backend, when generating Hiccup code. This new feature does not affect how you use stylefy on the frontend. If you don't need SSR, you can simply omit it by doing nothing.