jest.config.js

jest was used to define some early unit tests for this project, as well as to run the playwright testing framework.  Eventually, playwright defined its own test runner infrastructure, making jest-playwright obsolete for our use.  <br/><br/>However the early unit tests still rely on jest.  I have created <a href="https://github.com/Maps4HTML/Web-Map-Custom-Element/issues/737"><font color="#0000ff"><u>an issue to resolve / remove jest from the development dependencies.</u></font></a> <br/>