fixing bug in IE where link is throwing an error

package.json

@@ -2,7 +2,7 @@
   "author": "Jason Salzman",
   "name": "react-add-to-calendar",
   "description": "A simple and reusable add to calendar button component for React",
-  "version": "0.0.11",
+  "version": "0.0.12",
   "license": "MIT",
   "homepage": "https://github.com/jasonsalzman/react-add-to-calendar",
   "repository": {

src/ReactAddToCalendar.js

@@ -19,6 +19,14 @@ export default class ReactAddToCalendar extends React.Component {
 	}
 
 	componentWillMount() {
+				// polyfill for startsWith to fix IE bug
+				if (!String.prototype.startsWith) {
+					String.prototype.startsWith = function(searchString, position) {
+						position = position || 0;
+						return this.indexOf(searchString, position) === position;
+					};
+				}
+
         let isCrappyIE = false;
         if (typeof window !== 'undefined' && window.navigator.msSaveOrOpenBlob && window.Blob) {
             isCrappyIE = true;