Enable es6 imports when using typescript

[aralisza]

In the .d.ts file, numbro is being exported using export = numbro. In the PR that made this change, it says this is the only way to use it in typescript #232 , and it proposes to use

import * as numbro from "numbro"

to import. However, in newer versions, this now causes default to be imported as a .default member instead. Now, the only way of importing numbro properly is

import numbro = require("numbro");

This change enables using es6 syntax to import

import numbro from "numbro";

#352 explains the change in further detail.

[BenjaminVanRyseghem]

Thanks for your contribution 😄

could you add yourself in the AUTHORS file please 😄 ?

I'll merge this PR right after that

[aralisza]

@BenjaminVanRyseghem Is ths PR ok to merge now?

[BenjaminVanRyseghem]

Thanks for your contribution 😄

[BenjaminVanRyseghem]

in v2.1.1