Implement a function similar to _.clamp from the Lodash library. The function clamp takes three arguments: a number, a lower bound, and an upper bound. The function returns the number clamped within the inclusive lower and upper bounds.
Example usage
console.log(clamp(10, 5, 15)); // 10
console.log(clamp(4, 5, 15)); // 5
console.log(clamp(20, 5, 15)); // 15