feat(Tree): upgrade life circle

Author: myronliu347

src/tree/view/tree-node.jsx

@@ -1,6 +1,7 @@
 import React, { Component, Children } from 'react';
 import { findDOMNode } from 'react-dom';
 import PropTypes from 'prop-types';
+import { polyfill } from 'react-lifecycles-compat';
 import cx from 'classnames';
 import Icon from '../../icon';
 import Checkbox from '../../checkbox';
@@ -16,7 +17,7 @@ const isRoot = pos => /^0-(\d)+$/.test(pos);
 /**
  * Tree.Node
  */
-export default class TreeNode extends Component {
+class TreeNode extends Component {
     static propTypes = {
         _key: PropTypes.string,
         prefix: PropTypes.string,
@@ -109,19 +110,21 @@ export default class TreeNode extends Component {
         ]);
     }
 
+    static getDerivedStateFromProps(props) {
+        if ('label' in props) {
+            return {
+                label: props.label,
+            };
+        }
+
+        return null;
+    }
+
     componentDidMount() {
         this.itemNode = findDOMNode(this.refs.node);
         this.setFocus();
     }
 
-    componentWillReceiveProps(nextProps) {
-        if ('label' in nextProps) {
-            this.setState({
-                label: nextProps.label,
-            });
-        }
-    }
-
     componentDidUpdate() {
         this.setFocus();
     }
@@ -593,3 +596,5 @@ export default class TreeNode extends Component {
         );
     }
 }
+
+export default polyfill(TreeNode);