add npm badge

Author: joaomoreno

README.md

@@ -1,7 +1,7 @@
 # vsce
 > *The Visual Studio Code Extension Manager*
 
-[![Build Status](https://dev.azure.com/vscode/VSCE/_apis/build/status/VSCE?branchName=master)](https://dev.azure.com/vscode/VSCE/_build/latest?definitionId=16&branchName=master)
+[![Build Status](https://dev.azure.com/vscode/VSCE/_apis/build/status/VSCE?branchName=master)](https://dev.azure.com/vscode/VSCE/_build/latest?definitionId=16&branchName=master) [![npm version](https://badge.fury.io/js/vsce.svg)](https://badge.fury.io/js/vsce)
 
 ## Requirements