feat: 🎸 (upgrade) upgrade to Angular 12

BREAKING CHANGE: 🧨 Upgrade to Angular 12

✅ Closes: #72

Author: nivekcode

angular.json

@@ -10,7 +10,7 @@
       "prefix": "lib",
       "architect": {
         "build": {
-          "builder": "@angular-devkit/build-ng-packagr:build",
+          "builder": "@angular-devkit/build-angular:ng-packagr",
           "options": {
             "tsConfig": "projects/ng-sortgrid/tsconfig.lib.json",
             "project": "projects/ng-sortgrid/ng-package.json"
@@ -45,7 +45,6 @@
         "build": {
           "builder": "@angular-devkit/build-angular:browser",
           "options": {
-            "aot": true,
             "outputPath": "dist/ng-sortgrid-demo",
             "index": "projects/ng-sortgrid-demo/src/index.html",
             "main": "projects/ng-sortgrid-demo/src/main.ts",
@@ -60,7 +59,13 @@
               "projects/ng-sortgrid/src/lib/ngsg.css",
               "node_modules/@fortawesome/fontawesome-free/css/all.css"
             ],
-            "scripts": []
+            "scripts": [],
+            "vendorChunk": true,
+            "extractLicenses": false,
+            "buildOptimizer": false,
+            "sourceMap": true,
+            "optimization": false,
+            "namedChunks": true
           },
           "configurations": {
             "production": {
@@ -73,9 +78,7 @@
               "optimization": true,
               "outputHashing": "all",
               "sourceMap": false,
-              "extractCss": true,
               "namedChunks": false,
-              "aot": true,
               "extractLicenses": true,
               "vendorChunk": false,
               "buildOptimizer": true,
@@ -91,7 +94,8 @@
                 }
               ]
             }
-          }
+          },
+          "defaultConfiguration": ""
         },
         "serve": {
           "builder": "@angular-devkit/build-angular:dev-server",