Remove usages of non-existant generic parameters (redone)

[jwosty]

New attempt at #79, except replacing 'Out with unit instead of obj as per code review.

[alfonsogarciacaro]

Thanks!

[jwosty]

@alfonsogarciacaro do you have any way to test this? I have not tested it.

[MangelMaxime]

@jwosty The Fable.Browser API doesn't have any tests in it. So for now, we test it manually directly in our own projects directly 🙈 or via Fable REPL to see if its compile and works.

[alfonsogarciacaro]

[alfonsogarciacaro]

I've recently been using Web Test Runner. It makes it really easy to run tests against a headless Chrome and it works with Github Actions too. We could use it to set up some tests but it's a HUGE amount of work to properly test all the bindings, not sure if there are some tests from Typescript that we can try to translate automatically.

[MangelMaxime]

@alfonsogarciacaro I think we can do it small bit by small bit.

Would you be able to set up the Web Test Runner with the Github action?

I am planning to fix #47 since a long time and would need a CI setup for that. If you are happy with Web Test Runner I would be happy to use it instead of Mocha here.