[修改] 修改版本号为2.0.0

Author: AlianBlank

package.json

@@ -3,7 +3,7 @@
   "displayName": "Game Frame X Builder",
   "category": "Game Framework",
   "description": "独立游戏前后端一体化解决方案 https://gameframex.doc.alianblank.com/",
-  "version": "1.2.0",
+  "version": "2.0.0",
   "unity": "2019.4",
   "keywords": [
     "Game Framework"