[mypy] Type annotations for graphs directory (#5798)

* Type annotations for `breadth_first_search.py`

* Type annotations for `breadth_first_search_2.py`

* Remove from excluded in mypy.ini

* Add doctest.testmod()

* Type annotations for `graphs/check_cycle.py`

* Type annotations for `graphs/greedy_min_vertex_cover.py`

* Remove from excluded in mypy.ini

Rohan R Bharadwaj committed 4y ago

ed4c92d98af4b96605a0463bc94143b9c771a7cd

Parent: 4c9949f

Committed by GitHub <[email protected]> on 11/8/2021, 6:18:30 PM