Add the binder link

Author: dou-du

README.md

@@ -1,11 +1,11 @@
 
 # widget-code-input
 
-[![Build Status](https://travis-ci.org/osscar-org/widget-code-input.svg?branch=master)](https://travis-ci.org/osscar-org/widget_code_input)
-[![codecov](https://codecov.io/gh/osscar-org/widget-code-input/branch/master/graph/badge.svg)](https://codecov.io/gh/osscar-org/widget-code-input)
+A widget to allow input of a python function, with syntax highlighting.
 
+## Try it with JupyterLab !
 
-A widget to allow input of a python function, with syntax highlighting.
+[![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/osscar-org/widget-code-input/master?urlpath=%2Flab%2Ftree%2Fexamples%2Fintroduction.ipynb)
 
 ## Installation