chore: bump 2.0.0-beta.2

CHANGELOG.md

+# [2.0.0-beta.2](https://github.com/anncwb/vue-vben-admin/compare/2.0.0-beta.1...2.0.0-beta.2) (2020-10-07)
+
+### ✨ Features
+
+- **img-preview:** add imgPreview componnt ([e6093aa](https://github.com/anncwb/vue-vben-admin/commit/e6093aa))
+
+### 🔧 Continuous Integration
+
+- add github after release ([ee3f9d3](https://github.com/anncwb/vue-vben-admin/commit/ee3f9d3))
+
 # [2.0.0-beta.1](https://github.com/anncwb/vue-vben-admin/compare/351f60a...2.0.0-beta.1) (2020-09-30)
 
 ### 🎫 Chores