input: Write a python function to find all matches of a given regex pattern in a text.
  assert regex_match(r'\d+', 'There are 123 apples and 456 oranges.') == ['123', '456']
  assert regex_match(r'\b\w{5}\b', 'Hello there, this is a simple test.') == ['Hello', 'there', 'simple']
  assert regex_match(r'[A-Z]', 'The Quick Brown Fox Jumps Over The Lazy Dog') == ['T', 'Q', 'B', 'F', 'J', 'O', 'T', 'L', 'D']
output: def regex_match(pattern, text):
      import re
      return re.findall(pattern, text)