input: Write a function named random_number_generator that takes two numerical inputs min and max, and returns a random integer between min and max, including both endpoints.
  assert random_number_generator(2, 5) in [2, 3, 4, 5]
  assert random_number_generator(0, 10) in range(0, 11)
  assert random_number_generator(-5, 5) in range(-5, 6)
output: import random
  
  def random_number_generator(min, max):
      return random.randint(min, max)