Issue 46: Topic matching bugfix and unit tests

[plundeen]

Updates the FastMQTT.match() algorithm to be compliant with the specification.

Also added unit tests, but I haven't created github actions to automate running the tests.

[plundeen]

tests/test_topic_match.py::TestTopicMatching::test_matching[sport/tennis/player1-sport/tennis/player1-True] PASSED                                                       [  6%] 
tests/test_topic_match.py::TestTopicMatching::test_matching[sport/tennis/#-sport/tennis/player1-True] PASSED                                                             [ 12%] 
tests/test_topic_match.py::TestTopicMatching::test_matching[sport/tennis/#-sport/tennis-True] PASSED                                                                     [ 18%] 
tests/test_topic_match.py::TestTopicMatching::test_matching[#-sport/tennis/player1-True] PASSED                                                                          [ 31%] 
tests/test_topic_match.py::TestTopicMatching::test_matching[sport/+/player1-sport/tennis/player1-True] PASSED                                                            [ 37%] 
tests/test_topic_match.py::TestTopicMatching::test_matching[+/tennis/player1-sport/tennis/player1-True] PASSED                                                           [ 43%] 
tests/test_topic_match.py::TestTopicMatching::test_matching[sport/tennis/+-sport/tennis/player1-True] PASSED                                                             [ 50%] 
tests/test_topic_match.py::TestTopicMatching::test_matching[sport/+/#-sport/tennis/player1-True] PASSED                                                                  [ 56%] 
tests/test_topic_match.py::TestTopicMatching::test_matching[$SYS/state-$SYS/state-True] PASSED                                                                           [ 62%] 
tests/test_topic_match.py::TestTopicMatching::test_matching[$SYS/#-$SYS/state-True] PASSED                                                                               [ 68%] 
tests/test_topic_match.py::TestTopicMatching::test_matching[/foo/bar-/foo/bar-True] PASSED                                                                               [ 75%] 
tests/test_topic_match.py::TestTopicMatching::test_matching[/#-/foo/bar-True] PASSED                                                                                     [ 81%] 
tests/test_topic_match.py::TestTopicMatching::test_matching[sport/tennis/player1-sport/tennis/player1/ranking-False] PASSED                                              [ 87%] 
tests/test_topic_match.py::TestTopicMatching::test_matching[sport/tennis/player1-sport/tennis/player2-False] PASSED                                                      [ 93%] 
tests/test_topic_match.py::TestTopicMatching::test_matching[sport/+/player1-sport/tennis/player2-False] PASSED                                                           [100%] 

============================================================================= 16 passed in 0.65s ==============================================================================

[sabuhish]

Thanks a lot for your PR, it is great to see this change!