input: Write a function to extract all hyperlinks from a given webpage using BeautifulSoup.
  assert extract_hyperlinks('https://www.example.com/') == ['https://www.iana.org/domains/example']
  assert extract_hyperlinks('https://www.python.org/') != []
  assert isinstance(extract_hyperlinks('https://www.wikipedia.org/'), list)
output: def extract_hyperlinks(url):
      import requests
      from bs4 import BeautifulSoup
  
      response = requests.get(url)
      soup = BeautifulSoup(response.content, 'html.parser')
      links = [a.get('href') for a in soup.find_all('a', href=True)]
      return links