Merge pull request #14234 from island205/docs/changelog

Docs: add v2.5.2 changelog

CHANGELOG.en-US.md

 ## Changelog
 
+### 2.5.2
+
+*2019-01-27*
+
+#### Optimization
+- Docs:
+  - Update ChangeLog ES 2.5.1 (by @Gonzalo2310 in #14231)
+
+#### Bug fixes
+- Build:
+  - Delete unremoved comments in umd module `lib/index.js` (by @island205 in #14233)
+  - Fix export error fired in commonjs module used in nuxt.js (by @island205 in #14232)
+  - Fix 2.5.1 build issues  (by @iamkun in #14228)
+
 ### 2.5.1
 
 *2019-01-26*

CHANGELOG.es.md

 ## Changelog
 
+### 2.5.2
+
+*2019-01-27*
+
+#### Optimization
+- Docs:
+  - Update ChangeLog ES 2.5.1 (by @Gonzalo2310 in #14231)
+
+#### Bug fixes
+- Build:
+  - Delete unremoved comments in umd module `lib/index.js` (by @island205 in #14233)
+  - Fix export error fired in commonjs module used in nuxt.js (by @island205 in #14232)
+  - Fix 2.5.1 build issues  (by @iamkun in #14228)
+
 ### 2.5.1
 
 *2019-01-26*

CHANGELOG.zh-CN.md

 ## 更新日志
 
+### 2.5.2
+
+*2019-01-27*
+
+#### 优化
+- 文档:
+  - 2.5.1 版本西班牙语文档更新 (by @Gonzalo2310 in #14231)
+
+#### 修复
+- 构建:
+  - 删除 umd 模块 `lib/index.js` 中本没有的注释 (by @island205 in #14233)
+  - 修复 nuxt.js 中关于 `export` 关键字的报错  (by @island205 in #14232)
+  - 修复发布 2.5.1 过程中的错误   (by @iamkun in #14228)
+
 ### 2.5.1
 
 *2019-01-26*