fix(e2e): add detectOpenHandles and forceExit options to jest configuration

Author: NightDreams

api/e2e/books.integration.e2e.js

@@ -18,6 +18,8 @@ describe('Test for books', () => {
     app = createApp();
   });
 
+  afterAll;
+
   describe('test for [GET] /api/v1/books', () => {
     test('should return a list books', () => {
       // Arrange

api/e2e/jest.config.e2e.json

@@ -4,5 +4,7 @@
   "testEnvironment": "node",
   "moduleFileExtensions": ["js", "json"],
   "verbose": true,
-  "clearMocks": true
+  "clearMocks": true,
+  "detectOpenHandles": true,
+  "forceExit": true
 }