input: Write a python function to make a GET request to a specified URL and return the JSON response.
  assert fetch_data('https://api.example.com/xyz') == [{'id': 1, 'name': 'item1'}, {'id': 2, 'name': 'item2'}]
  assert fetch_data('https://api.example.com/abc') == [{'id': 3, 'name': 'item3'}, {'id': 4, 'name': 'item4'}]
  assert fetch_data('https://api.example.com/def') == [{'id': 5, 'name': 'item5'}, {'id': 6, 'name': 'item6'}]
output: import requests
  
  def fetch_data(url):
      response = requests.get(url)
      return response.json()