fix: error when dataKey value is 0

Author: mfuu

dist/virtual-list.js

@@ -1,5 +1,5 @@
 /*!
- * vue-virtual-sortable v2.0.1
+ * vue-virtual-sortable v2.0.2
  * open source under the MIT license
  * https://github.com/mfuu/vue-virtual-sortable#readme
  */
@@ -1059,7 +1059,7 @@
     return result;
   }
   function isSameValue(a, b) {
-    return a == b;
+    return a === 0 ? a === b : a == b;
   }
   function getDataKey(item, dataKey) {
     return (!Array.isArray(dataKey) ? dataKey.replace(/\[/g, '.').replace(/\]/g, '.').split('.') : dataKey).reduce(function (o, k) {

dist/virtual-list.min.js

@@ -1,13 +1,14 @@
 {
   "name": "vue-virtual-sortable",
-  "version": "2.0.1",
+  "version": "2.0.2",
   "description": "A virtual scrolling list component that can be sorted by dragging",
   "main": "dist/virtual-list.min.js",
   "files": [
     "dist"
   ],
   "scripts": {
     "build": "rollup --config",
+    "publish": "npm publish",
     "core:update": "git submodule update --remote",
     "docs:dev": "vuepress dev docs --temp .temp",
     "docs:build": "vuepress build docs"