updated CHANGELOG

CHANGELOG-zh.md

@@ -1,8 +1,10 @@
-# 0.5.1 (TBC)
+# 0.5.1 (2020-07-31)
 ### 功能 / 优化
 - **加入错误详情信息**.
 - **加入 Golang 编程语言支持**.
 - **加入 Chrome Driver 和 Firefox 的 Web Driver 安装脚本**.
+- **支持系统任务**. "系统任务"跟普通爬虫任务相似，允许用户查看诸如安装语言之类的任务日志.
+- **将安装语言从 RPC 更改为系统任务**.
 
 ### Bug 修复
 - **修复在爬虫市场中第一次下载爬虫时会报500错误**. [#808](https://github.com/crawlab-team/crawlab/issues/808)

CHANGELOG.md

@@ -1,8 +1,10 @@
-# 0.5.1 (TBC)
+# 0.5.1 (2020-07-31)
 ### Features / Enhancement
 - **Added error message details**.
 - **Added Golang programming language support**.
 - **Added web driver installation scripts for Chrome Driver and Firefox**.
+- **Support system tasks**. A "system task" is similar to normal spider task, it allows users to view logs of general tasks such as installing languages.
+- **Changed methods of installing languages from RPC to system tasks**.
 
 ### Bug Fixes
 - **Fixed first download repo 500 error in Spider Market page**. [#808](https://github.com/crawlab-team/crawlab/issues/808)