input: Write a python function to count the number of tags in a given webpage.
  assert count_tags('https://www.example.com') == 2
  assert count_tags('https://www.python.org') > 0
  assert count_tags('https://www.wikipedia.org') > 0
output: import requests
  from bs4 import BeautifulSoup
  
  def count_tags(url):
      response = requests.get(url)
      soup = BeautifulSoup(response.text, 'html.parser')
      return len(soup.find_all())