Adds get_attribute and get_cookies method

[tomasserravento]

This can be used to get attributes such as class, aria-label, aria-valuenow, etc.

I have been using caqui and for now it works perfectly. I needed to get the attribute of an element but I couldnt find a method to do so, so here it is. I have tested it and it works fine.

Thanks for the work here!

[douglasdcm]

Thanks a lot @tomasserravento for this contribution. Can you add the unit tests for all functions, please? I'm trying to keep a high code coverage. There are many examples for synchronous and asynchronous functions. If you have any issue, please let me know

[tomasserravento]

Hey, just added the unit tests @douglasdcm . I hope they are okay!

============================================================================= test session starts ==============================================================================
platform win32 -- Python 3.10.6, pytest-7.3.1, pluggy-1.0.0
rootdir: D:\GitHub\caqui
plugins: asyncio-0.21.0
asyncio: mode=strict
collected 54 items

tests\test_sniffer.py ssssss                                                                                                                                              [ 11%] 
tests\feature\test_sync_and_async.py ...........                                                                                                                          [ 31%]
tests\integration\test_async_scenarios.py .                                                                                                                               [ 33%]
tests\integration\test_sync_scenarios.py .                                                                                                                                [ 35%]
tests\unit\test_async_unit.py ................                                                                                                                            [ 64%]
tests\unit\test_helper.py ....                                                                                                                                            [ 72%] 
tests\unit\test_sync_unit.py ...............                                                                                                                              [100%]

======================================================================== 48 passed, 6 skipped in 7.86s =========================================================================