fix: make universal rendering work without any hacks

Fixes #1211

Author: mattlewis92

README.md

@@ -108,11 +108,7 @@ Where possible this library will strictly adhere to [semver](http://semver.org/)
 
 ### Is this library AoT and universal compatible?
 
-Yes. For universal to work though, you will need to add this near the top of your `server.ts` file:
-
-```ts
-global['window'] = {};
-```
+Yes.
 
 ### What major versions of angular does this library support?
 

package-lock.json

@@ -156,7 +156,7 @@
     "@angular/core": ">=6.0.0 <10.0.0"
   },
   "dependencies": {
-    "angular-draggable-droppable": "^4.3.10",
+    "angular-draggable-droppable": "^4.3.12",
     "angular-resizable-element": "^3.3.0",
     "calendar-utils": "^0.7.0",
     "positioning": "^2.0.1"