[base-ui] Fix tooltip update issue

Summary:
使用 dom dataset 来缓存

以及

vuejs/vue#314

Test Plan: as above

Reviewers: #web_reviewers, kuilin

Reviewed By: #web_reviewers, kuilin

Differential Revision: https://code.yangqianguan.com/D45553

Author: lany44

dist/base-ui.min.js

@@ -1,6 +1,6 @@
 {
   "name": "base-ui",
-  "version": "0.0.111",
+  "version": "0.0.112",
   "description": "A component library for Better Vue developmemt",
   "main": "./dist/base-ui.min.js",
   "repository": {

package.json

@@ -32,10 +32,10 @@ export default {
     },
 
     inserted(el, {value}, vnode) {
-        vnode.$$curTipText = value;
+        el.dataset.tipText = value;
 
         vnode.$$tooltipMouseover = () => {
-            toolTipEle.innerText = vnode.$$curTipText;
+            toolTipEle.innerText = el.dataset.tipText;
             Object.assign(toolTipEle.style, {
                 display: 'block'
             });
@@ -57,8 +57,8 @@ export default {
         el.addEventListener('mouseout', vnode.$$tooltipMouseout);
     },
 
-    update(el, {value}, vnode) {
-        vnode.$$curTipText = value;
+    update(el, {value}) {
+        el.dataset.tipText = value;
     },
 
     unbind(el, binding, vnode) {