docs(readme): update readme

README.md

@@ -1,2 +1,32 @@
 # fly-helper
-工具库
+
+It's a Tool library, method collection.
+
+![test](https://github.com/simonwong/fly-helper/workflows/test/badge.svg)
+[![codecov](https://codecov.io/gh/simonwong/fly-helper/branch/master/graph/badge.svg)](https://codecov.io/gh/simonwong/fly-helper)
+
+
+## Usage
+
+- install
+
+```shell
+npm install fly-helper --save
+
+# or
+
+yarn add fly-helper
+```
+
+- example
+
+```javascript
+import { isNumber } from 'fly-helper'
+
+isNumber()
+```
+
+
+## License
+
+The scripts and documentation in this project are released under the [MIT License](https://github.com/simonwong/fly-helper/blob/master/LICENSE)