chore: add CHANGE_LOG.en_US

CHANGELOG.en_US.md

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+# 2.0.0-beta.7 (2020-10-12)
+
+### ⚡ Performance Improvements
+
+- The existing tab switching no longer displays animation and progress bar
+
+### ✨ Features
+
+- Added `CountTo` component and sample demo
+- Added `closeMessageOnSwitch` and `removeAllHttpPending` to the project configuration file
+- The production environment has a separate configuration file for dynamic configuration project configuration
+- Added ʻuseEcharts` and ʻuseApexChart` to facilitate the use of charts, and added related demos
+- New workbench interface
+- New analysis page interface
+
+### 🎫 Chores
+
+- Update dependencies
+
+### 🐛 Bug Fixes
+
+- Fix routing switch, tab inactive problem
+
+# 2.0.0-beta.6 (2020-10-11)
+
+### 💄 Styles
+
+- Menu style adjustment
+
+### 🐛 Bug Fixes
+
+- Fix the problem that editable forms cannot be entered
+- Repair packaging errors, no proxy is required in the production environment
+
+### ⚡ Performance Improvements
+
+- Optimize the switching speed of multi-tab pages
+- First screen loading animation
+
+# 2.0.0-beta.5 (2020-10-10)
+
+### ♻ Code Refactoring
+
+- Delete `tailwind css`
+
+### ⚡ Performance Improvements
+
+- Optimize page switching speed
+
+### 🎫 Chores
+
+- Add `.vscode` and `.github` configuration
+- Change menu icon
+- Added `.env` configuration file
+- Update readme.md
+
+### 🐛 Bug Fixes
+
+- Fix the failure of `Tree` component check event
+
+# 2.0.0-beta.4 (2020-10-08)
+
+### 🎫 Chores
+
+- Remove redundant dependencies
+
+### 🐛 Bug Fixes
+
+- Fix page refresh blank
+- Fix the invalid table style in the production environment
+
+# 2.0.0-beta.3 (2020-10-07)
+
+### ✨ Features
+
+- Added ʻopenNProgress` to the project configuration file to control whether to open the top control bar
+- Add `Table` component and demo
+
+### 🎫 Chores
+
+- Add ` github workflows`
+
+# 2.0.0-beta.2 (2020-10-07)
+
+### ✨ Features
+
+- Added image preview component
+
+### 🔧 Continuous Integration
+
+- Add githubAction script
+
+# 2.0.0-beta.1(2020-09-30)
+
+### 🎫 Chores
+
+- Migrate some code from 1.0
+- Add README.md description file
+
+### 🐛 Bug Fixes
+
+- Fix the problem of form, animation and packaging failure