Adding support to React node type (string or jsx tags) to the node label.

Author: lucas-issa

README.md

@@ -110,7 +110,7 @@ Individual nodes within the `nodes` property can have the following structure:
 
 | Property    | Type   | Description                     |
 | ----------- | ------ | ------------------------------- |
-| `label`     | string | **Required**. The node's label. |
+| `label`     | mixed  | **Required**. The node's label. |
 | `value`     | mixed  | **Required**. The node's value. |
 | `children`  | array  | An array of child nodes.        |
 | `className` | string | A className to add to the node. |

src/js/TreeNode.js

@@ -10,7 +10,7 @@ class TreeNode extends React.Component {
 		disabled: PropTypes.bool.isRequired,
 		expandDisabled: PropTypes.bool.isRequired,
 		expanded: PropTypes.bool.isRequired,
-		label: PropTypes.string.isRequired,
+		label: PropTypes.node.isRequired,
 		optimisticToggle: PropTypes.bool.isRequired,
 		showNodeIcon: PropTypes.bool.isRequired,
 		treeId: PropTypes.string.isRequired,

src/js/nodeShape.js

@@ -1,7 +1,7 @@
 import PropTypes from 'prop-types';
 
 const nodeShape = {
-	label: PropTypes.string.isRequired,
+	label: PropTypes.node.isRequired,
 	value: PropTypes.oneOfType([
 		PropTypes.string,
 		PropTypes.number,