3.0.0: Nazeh/css namespace (#187)
* Change CSS namespacing Update components to use namespaced classNames Update tests & snaps to use namespaced classNames Update less to use namespace reactist_ Update version, changelog and static artifacts * Update version to 3.0.0 * Fix Tabs component's --spreadlayout modifier * Final release preparations Co-authored-by: Ar Nazeh <[email protected]>