chore: update to Angular 15

Author: AhsanAyaz

angular.json

@@ -22,20 +22,12 @@
           "options": {
             "tsConfig": "projects/angular-tags-input/tsconfig.lib.json",
             "project": "projects/angular-tags-input/ng-package.json"
-          }
-        ,          "configurations": {
+          },
+          "configurations": {
             "production": {
               "tsConfig": "projects/angular-tags-input/tsconfig.lib.prod.json"
             }
           }
-},
-        "test": {
-          "builder": "@angular-devkit/build-angular:karma",
-          "options": {
-            "main": "projects/angular-tags-input/src/test.ts",
-            "tsConfig": "projects/angular-tags-input/tsconfig.spec.json",
-            "karmaConfig": "projects/angular-tags-input/karma.conf.js"
-          }
         }
       }
     },
@@ -62,9 +54,7 @@
               "projects/tags-input-demo/src/favicon.ico",
               "projects/tags-input-demo/src/assets"
             ],
-            "styles": [
-              "projects/tags-input-demo/src/styles.scss"
-            ],
+            "styles": ["projects/tags-input-demo/src/styles.scss"],
             "scripts": [],
             "vendorChunk": true,
             "extractLicenses": false,
@@ -132,9 +122,7 @@
               "projects/tags-input-demo/src/favicon.ico",
               "projects/tags-input-demo/src/assets"
             ],
-            "styles": [
-              "projects/tags-input-demo/src/styles.scss"
-            ],
+            "styles": ["projects/tags-input-demo/src/styles.scss"],
             "scripts": []
           }
         },

jest.config.js

@@ -19,12 +19,15 @@ module.exports = {
         "<rootDir>/e2e-playwright/",
         "<rootDir>/projects/tags-input-demo/", // Ignore demo app tests for this project config
       ],
-      globals: {
-        "ts-jest": {
-          tsconfig: "<rootDir>/projects/angular-tags-input/tsconfig.spec.json",
-          stringifyContentPathRegex: "\\.html$",
-          diagnostics: false,
-        },
+      transform: {
+        "^.+\\.(ts|js|mjs|html|svg)$": [
+          "jest-preset-angular",
+          {
+            tsconfig:
+              "<rootDir>/projects/angular-tags-input/tsconfig.spec.json",
+            stringifyContentPathRegex: "\\.html$",
+          },
+        ],
       },
     },
     // Configuration for the demo application
@@ -41,12 +44,14 @@ module.exports = {
         "<rootDir>/projects/angular-tags-input/", // Ignore library tests for this project config
         "<rootDir>/projects/tags-input-demo/src/test.ts", // Ignore Karma setup file specifically for demo project
       ],
-      globals: {
-        "ts-jest": {
-          tsconfig: "<rootDir>/projects/tags-input-demo/tsconfig.spec.json", // Use demo-specific tsconfig
-          stringifyContentPathRegex: "\\.html$",
-          diagnostics: false,
-        },
+      transform: {
+        "^.+\\.(ts|js|mjs|html|svg)$": [
+          "jest-preset-angular",
+          {
+            tsconfig: "<rootDir>/projects/tags-input-demo/tsconfig.spec.json", // Use demo-specific tsconfig
+            stringifyContentPathRegex: "\\.html$",
+          },
+        ],
       },
       moduleNameMapper: {
         // Map the library's public API path for demo app tests