feat(*): Upgrade to Angular 11 (#203)

- Updgrade to Angular 11
- Update docs

BREAKING CHANGE: The upgrade to Angular 11 breaks compatibility with Angular 10.

Author: itsdevdom

README.md

@@ -41,6 +41,7 @@ The following list describes the compatibility with Angular:
 | `6.x`            | `8.x`   |
 | `7.x`            | `9.x`   |
 | `8.x`            | `10.x`  |
+| `9.x`            | `11.x`  |
 
 <br>
 

angular.json

@@ -9,7 +9,7 @@
       "sourceRoot": "projects/angular-notifier/src",
       "architect": {
         "build": {
-          "builder": "@angular-devkit/build-ng-packagr:build",
+          "builder": "@angular-devkit/build-angular:ng-packagr",
           "options": {
             "tsConfig": "projects/angular-notifier/tsconfig.lib.json",
             "project": "projects/angular-notifier/ng-package.json"
@@ -57,7 +57,6 @@
               "optimization": true,
               "outputHashing": "all",
               "sourceMap": false,
-              "extractCss": true,
               "namedChunks": false,
               "extractLicenses": false,
               "vendorChunk": false,