New Functions Added

• randomColor
  • returns a random color e.g "red", "green", "blue", "violet"
• randomHsl
  • return a random HSL color e.g "hsl(180, 50%, 50%)"
• randomString
  • return a random string depending on the length parameter e.g "hwiok"
• isHappyNumber
  • returns true if number converges to a sum of 1 after getting replaced by the sum of the square of its digits (leetcode challenge)