Move karma unit tests to jest (#1047)

* Move karma unit tests to jest
* Fix karma to jest errors in book-navigator.test.js
* Fix karma to jest for ia-bookmarks.test.js
* Don't run karma anymore ; no more karma tests!

Co-authored-by: no382001 <s@x240>
Co-authored-by: Drini Cami <cdrini@gmail.com>

Author: 3 people

package-lock.json

@@ -116,7 +116,7 @@
     "serve": "npx http-server . --port 8000",
     "serve-live": "npx live-server . --port 8000 --watch=index.html,BookReader,BookReaderDemo",
     "serve-dev": "npm run build-css && npx concurrently --kill-others npm:serve-live npm:build-*:watch",
-    "test": "npx concurrently --group npm:test-jest npm:test-karma",
+    "test": "npm run test-jest",
     "test:e2e": "npm run build && npx testcafe",
     "test:e2e:dev": "npx testcafe --live --dev",
     "test-jest:watch": "npx jest --watch",