Replace npmcdn.com with unpkg.com (#68)

Author: npmcdn-to-unpkg-bot

README.md

@@ -20,8 +20,8 @@ npm install react-maskedinput --save
 
 The browser bundle exposes a global `MaskedInput` variable and expects to find a global `React` (>= 0.14.0) variable to work with.
 
-* [react-maskedinput.js](https://npmcdn.com/react-maskedinput/umd/react-maskedinput.js) (development version)
-* [react-maskedinput.min.js](https://npmcdn.com/react-maskedinput/umd/react-maskedinput.min.js) (compressed production version)
+* [react-maskedinput.js](https://unpkg.com/react-maskedinput/umd/react-maskedinput.js) (development version)
+* [react-maskedinput.min.js](https://unpkg.com/react-maskedinput/umd/react-maskedinput.min.js) (compressed production version)
 
 ## Usage