v2.0.0 (Major version, Breaking Changes)

• Now initialization must be done using classes instead of functions. (e.g., new UseBootstrap(target) instead of UseBootstrap(target)).
• Configuration attribute has been changed from "data-ub-select-[config]" to "data-[config]". (e.g., data-clearable="true" instead of data-ub-select-clear).
• The use-bootstrap-select now works without Bootstrap JavaScript.
• The dropdown menu position is now static, you can configure it to be shown on the down or up.
• Added several new methods.