feat: added initialRangeSelected

[OtavioStasiak]

Objective

• Add two new props ( initialHighValue, initialLowValue};
  
• If you set this props on RangeSlider component you can set a initial value when the component mount;
  

• This values (initialLowValue and initialHighValue) should be between min an max props;
  
  

  How to test

  • import RangeSlider component;
    
  • set initialLowValue and initialHighValue (this values should be between min and max);
    
  • when the component mount, you will see the result;