`importHelpers` generates code, that is incompatible with browsers

Currently enabling importHelpers adds

import * as tslib_1 from "tslib";

at the top of every source file.

Such notation is not compatible with browsers. Nowadays, all modern browsers supports Ecma modules, there's no reason for writing code that assumes Node.js environment + bundler build. Code should assume "Ecma modules" environment instead. And bundlers can stop being compilers and do the work they are supposed to do - create optimized builds (if needed at all).

The change is simple, importHelpers should generate:

import * as tslib_1 from "../../../node_modules/tslib/index.js";

The path to "node_modules" should be determined at compile time of course.

Comienza rastreando el código del compilador de TypeScript que emite el import de tslib de importHelpers. Compara el especificador de módulo actual con la ruta compatible con el navegador solicitada y, a continuación, verifica que el import generado se resuelva desde un entorno de Ecma modules y que la ruta de node_modules se determine en tiempo de compilación.