fix: Export a "default" property

[felixrieseberg]

Fixes #323

Older versions of @electron/asar exported all its functions at the top-level. TypeScript would take our old module, and if someone (like @electron/forge) ran import asar from "@electron/asar", execute the following code:

var asar = __importDefault(require("@electron/asar"))

var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};

// later, in our @electron/forge code:
await asar_1.default.createPackageWithOptions(...)

In our old version, that would result in:

asar = {
  default: {
     [... all our methods]
  }
}

Now, we're setting __esModule: true, so TypeScript will just return:

asar = {
  default: undefined 
}

And therefore, all code that looks like

await asar_1.default.createPackageWithOptions(...)

crashes, because default is now undefined.

[continuous-auth]

🎉 This PR is included in version 3.2.12 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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