Improved code porting to other Javascript's enviroments

Idk, I never in my life had so many ups and downs. Idk if I still need "cross-fetch", if the new req variable is a good idea and a lot more of things.

But one thing is certain: you can now run the code in Deno using https://esm.sh/[email protected] .

And that's all I care for.

Now, I can sleep...