Fix #4 and incorrect options issue

[BurningLutz]

As is mentioned in #4, numPassedTests(an other fields used by drawScoreboard) is not provided in onRunStart callback so its value is "undefined", We should give it a default value.

And, as is mentioned in jest's doc:

Custom reporter modules must define a class that takes a GlobalConfig and reporter options as constructor arguments:

// my-custom-reporter.js
class MyCustomReporter {
  constructor(globalConfig, options) {
    this._globalConfig = globalConfig;
    this._options = options;
  }

  onRunComplete(contexts, results) {
    console.log('Custom reporter output:');
    console.log('GlobalConfig: ', this._globalConfig);
    console.log('Options: ', this._options);
  }
}

module.exports = MyCustomReporter;

The first arg of constructor is GlobalConfig but we don't use it, so just skip it.

[philihp]

@abdulhannanali can we get some of these fixes merged? this issue was first reported in 2017