moving towards TS

[firstdorsal]

I dont expect you to merge this but i thought i would share it with you.

• replaced let with const where possible
• arrow functions
• compile directly from ts
• make it usable in deno
• still works

[elgs]

Thanks for the PR.

• replaced let with const where possible

This project started before let was introduced to js, then I replaced most, if not all vars to lets. Yes, they should be changed to const.

• arrow functions

I don't have any preference for this. Actually there is subtle difference for the reference of this for a function vs. an arrow function. But in this case, they should be the same.

• compile directly from ts

I try to avoid compilation for a small single js file project like this. But this is purely opinionated. You could be totally right and I be totally wrong.

• make it usable in deno

I thought the current code works with Deno, or does it not?

• still works

🎉