Added morphological operations, fixes: #5197 (#5199)

* Added morphological operations, fixes: #5197

* Added dilation tests and type hints

* Added erosion tests and type hints

* fixes: TheAlgorithms#5197

* fixes: TheAlgorithms#5197

* Update erosion_operation.py

* made suggested changes in dilation

* made suggested changes in erosion

* made suggested changes in dilation

* removed extra spaces in the tests

* removed extra spaces in the tests