fix: add Angular v11 in peer dependencies (#979)

Author: alan-agius4

package.json

@@ -89,8 +89,8 @@
     "typescript": "3.9.6"
   },
   "peerDependencies": {
-    "@angular/compiler": ">=2.3.1 <11.0.0 || >9.0.0-beta <11.0.0 || >9.1.0-beta <11.0.0 || >9.2.0-beta <11.0.0",
-    "@angular/core": ">=2.3.1 <11.0.0 || >9.0.0-beta <11.0.0 || >9.1.0-beta <11.0.0 || >9.2.0-beta <11.0.0",
+    "@angular/compiler": ">=2.3.1 <12.0.0 || ^11.0.0-next || ^11.1.0-next || ^11.2.0-next",
+    "@angular/core": ">=2.3.1 <12.0.0 || ^11.0.0-next || ^11.1.0-next || ^11.2.0-next",
     "tslint": "^5.0.0 || ^6.0.0"
   },
   "dependencies": {