Styling props for Line graph

[AlmahaAlmalki]

Graph.propTypes = {
  lineWidth: propTypes.number,
  lineOpacity: propTypes.number, 
  
  shadeAreaColor: propTypes.string,
  shadeAreaOpacity: propTypes.number,

  axisColor: PropTypes.string,
  axisWidth: PropTypes.number,
  axisOpacity: PropTypes.number,
  
  gridColor: PropTypes.string,
  gridWidth: propTypes.number,
  gridOpacity: PropTypes.number,

  ticksColor: PropTypes.string,
  ticksWidth: propTypes.number,
  ticksOpacity: propTypes.number, 

  labelColor: PropTypes.string,
  labelFontSize: propTypes.number,
  labelFontType: propTypes.number,

  graphTitleColor: propTypes.string,
  graphTitleFontSize: propTypes.number,
  graphTitleFontType: propTypes.number
}

[alisaono]

• Implement lineOpacity, shadeAreaColor, shadeAreaOpacity
• Update README