Add browser compatibility info

Author: ueler

README.md

@@ -48,5 +48,9 @@ this.ngLazyloadScriptService.loadScript('https://js.stripe.com/v3/').subscribe((
 });
 ```
 
-## Compatibility
+## Angular compatibility
 The library works with Angular versions ``>=8.0.0``.
+
+## Browser compatibility
+Works in all modern browsers if the ``browserlist`` file in your Angular project is configured appropriately.  
+Tested successfully in IE11, Edge, Chrome and Firefox.

projects/ng-lazyload-script-example/browserslist

@@ -9,4 +9,5 @@
 last 2 versions
 Firefox ESR
 not dead
-not IE 9-11 # For IE 9-11 support, remove 'not'.
+not IE 9-10 # For IE 9-11 support, remove 'not'.
+IE 11