chore: Move supportRef into rc-util

Author: zombieJ

package.json

@@ -40,7 +40,7 @@
   },
   "dependencies": {
     "classnames": "^2.2.1",
-    "rc-util": "^4.13.0",
+    "rc-util": "^4.14.0",
     "resize-observer-polyfill": "^1.5.1"
   },
   "devDependencies": {

src/index.tsx

@@ -2,9 +2,8 @@ import * as React from 'react';
 import findDOMNode from 'rc-util/lib/Dom/findDOMNode';
 import toArray from 'rc-util/lib/Children/toArray';
 import warning from 'rc-util/lib/warning';
-import { composeRef } from 'rc-util/lib/ref';
+import { composeRef, supportRef } from 'rc-util/lib/ref';
 import ResizeObserver from 'resize-observer-polyfill';
-import { supportRef } from './util';
 
 const INTERNAL_PREFIX_KEY = 'rc-observer-key';