Update FIFA World Cup 2018

I tested this bot briefly in the official game GAME_SLUG=wm18-tippspiel. It seems to work, but it may or may not break in the future. Don't hesitate to file a bug, as I will probably not be using it actively.

Usage

1. Run > yarn install.
2. setup an .env file with your kicktipp username, group and password as follows:

USER_NAME=bratwurst
PASSWORD=very_secure_passw0rd
GAME_SLUG=meine-tipprunde

3. Run > yarn start and enjoy.

Pro Tips

• If you don't know, why the bot fails, run it in window mode: yarn start --env window
• Make sure, you have answered all non-result questions before starting the bot (e.g. "Who will become FIFA World Champion 2018?" - the bot does not know which team will dominate (although it is in favor of Germany...)

Feature Requests

• add a smarter predictor implementation, which does not rely on the btwin quota, so it can predict e.g. the whole Bundesliga season in one session
• dump nightwatch for something nicer, e.g. puppeteer.