jest-dev-server support

[thernstig]

Contemplating to move to Playwright, but due to dependency to jest-puppeteer I need to make sure this plugin will work just as well. I could not find in the documentation if https://github.com/smooth-code/jest-puppeteer#start-a-server is supported. Could this be added and if it already is, the README updated with information about it.

[mmarkelov]

@thernstig there is no jest-dev-server support right now. I'll take it in progress. I suppose it wouldn't take much time to support jest-dev-server

[thernstig]

@mmarkelov stellar work 🥇