Fix Rcon is not a constructor

[nickdnk]

Hello

This fixes #13 which just broke my system (again).

I'm not very well-versed in node or modules, but I know this makes the package work as a module and prevents the above error, probably without breaking anything else, as I left the normal export default in there.

[nickdnk]

To clarify, the JS output from tsc simply becomes this, which seems to work fine.

// rcon.js
exports.default = RCON;
module.exports = RCON;

I'm using the package like this. All other dependencies in the project work fine using the import statement, just like the readme for this package tells me to do.

// package.json
{
  "type": "module",
  "dependencies": {
    "typescript": "^5.1.6",
    "rcon-srcds": "^2.1.0"
  }
}

// app.ts
import RCON from "rcon-srcds";

new RCON({...});
        
// error

For TypeScript I'm using "target": "ES2022" and "module": "ES2022"

[EnriqCG]

At first glance, this does not look like it's gonna be an issue. I want to make sure this works properly though, so I'll verify it before merging.

[ari-party]

I have published Nico's branch to @robertsspaceindustries/rcon-srcds until it is merged and published.