Merge branch 'nelsonwong1012-active_dot_class'

Author: elrumordelaluz

src/Tour.js

@@ -517,6 +517,9 @@ class Tour extends Component {
                         disabled={current === i || disableDotsNavigation}
                         showNumber={showNavigationNumber}
                         data-tour-elem="dot"
+                        className={cn(CN.dot.base, {
+                          [CN.dot.active]: current === i,
+                        })}
                       />
                     ))}
                   </Navigation>
@@ -569,6 +572,10 @@ const CN = {
     base: 'reactour__helper',
     isOpen: 'reactour__helper--is-open',
   },
+  dot: {
+    base: 'reactour__dot',
+    active: 'reactour__dot--is-active',
+  },
 }
 
 const setNodeState = (node, helper, position) => {