run() with ReactPHP http server middleware

[pfk84]

Suggestion for #190

[SimonFrings]

Hey @pfk84 thanks for looking into this, I wrote an answer in #190 about this topic which also references this pull request.

[clue]

@pfk84 Thank you for looking into this! Just merged #311 which adds experimental support for passing HTTP middleware to the built-in web server, building on top of the ideas discussed here and in #190 👍