Add more params

[diegogurgel]

Would be nice if we can use scale, color, margin, etc.

[danielehrhardt]

export const DEFAULT_VALUES = {
  elementType: NgxQrcodeElementTypes.URL,
  cssClass: 'qrcode',
  value: 'https://www.techiediaries.com',
  version: '' as NgxQrcodeVersionType,
  errorCorrectionLevel: NgxQrcodeErrorCorrectionLevels.MEDIUM,
  margin: 4,
  scale: 4,
  width: 10,
  colorDark: '#000',
  colorLight: '#FFF'
};