docs: update readme.md

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2018 Ryn xiao
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -1,9 +1,25 @@
 ## datepicker
 
-之前版本，可查看`tag`v1.0.0
+之前版本，可查看`tag` v1.0.0
 
 ```shell
 $ git clone https://github.com/Rynxiao/datepicker.git
 $ git tag
 $ git checkout v1.0.0
-```
+```
+# 重构之后版本 
+
+`tag` v2.0.0
+
+```shell
+$ node -v 
+v8.11.3
+
+$ npm -v
+v5.6.0
+
+$ yarn -v
+1.7.0
+```
+
+