input: Write a python function to fetch employee data from the SQLite database.
  assert get_employees() == <expected_output_for_test_db_1>
  assert get_employees() == <expected_output_for_test_db_2>
  assert get_employees() == <expected_output_for_test_db_3>
output: import sqlite3
  
  def get_employees():
      conn = sqlite3.connect('employee.db')
      cursor = conn.cursor()
      
      cursor.execute("SELECT * FROM employees")
      data = cursor.fetchall()
      
      conn.close()
      return data