fix(tree): now passes selectFg and selectBg options in tree, to list. (#196)

Author: cwingrav

Diff for: lib/widget/tree.js

@@ -39,7 +39,8 @@ function Tree(options) {
     ignoreKeys: options.ignoreKeys,
     scrollable: options.scrollable,
     mouse: options.mouse,
-    selectedBg: 'blue',
+    selectedBg: options.selectedBg || 'blue',
+    selectedFg: options.selectedFg || 'black',
   });
 
   this.append(this.rows);