Typescript support

[atlanteh]

Since the UdgerParser class is not exposed, but only a default function that instantiate the class, there's no way to reference it in a typescript project and take advantage of static analysis.
For example:

class MyClass {
  constructor(private _uaParser: UdgerParser) {}
  
  getUserAgentInfo(req: Request) {
    const ua = req.headers['user-agent']
    return this._uaParser.parseUa(ua);
  }
}

Can you please expose the class (and maybe add correct types as well?)

[atlanteh]

@eviltik can you please help?

[eviltik]

No, i'm not typescript compliant :( PR welcome !