chore: switch from Karma & Jasmine to Jest

Author: arturovt

.gitignore

@@ -41,6 +41,7 @@ npm-debug.log
 yarn-error.log
 testem.log
 /typings
+.cache
 
 # System Files
 .DS_Store

angular.json

@@ -25,12 +25,7 @@
           "defaultConfiguration": "production"
         },
         "test": {
-          "builder": "@angular-devkit/build-angular:karma",
-          "options": {
-            "main": "projects/elements/test.ts",
-            "tsConfig": "projects/elements/tsconfig.spec.json",
-            "karmaConfig": "projects/elements/karma.conf.js"
-          }
+          "builder": "@angular-builders/jest:run"
         },
         "lint": {
           "builder": "@angular-eslint/builder:lint",
@@ -121,20 +116,7 @@
           }
         },
         "test": {
-          "builder": "@angular-devkit/build-angular:karma",
-          "options": {
-            "main": "projects/elements-demo/src/test.ts",
-            "polyfills": "projects/elements-demo/src/polyfills.ts",
-            "tsConfig": "projects/elements-demo/tsconfig.spec.json",
-            "karmaConfig": "projects/elements-demo/karma.conf.js",
-            "assets": [
-              "projects/elements-demo/src/favicon.ico",
-              "projects/elements-demo/src/assets",
-              "projects/elements-demo/src/manifest.webmanifest"
-            ],
-            "styles": ["projects/elements-demo/src/styles.scss"],
-            "scripts": []
-          }
+          "builder": "@angular-builders/jest:run"
         },
         "lint": {
           "builder": "@angular-eslint/builder:lint",