* fix(mypy): type annotations for cipher algorithms
* Update mypy workflow to include cipher directory
* fix: mypy errors in hill_cipher.py
* fix build errors
* Tighten up psf/black and flake8
* Fix some tests
* Fix some E741
* Fix some E741
* updating DIRECTORY.md
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* Update morse_code_implementation.py
* Delete porta_cipher.py
* Update mixed_keyword_cypher.py
* Mixed keyword cypher added
* issue with mixed keyword fixed
* no math included
* hardcoded inputs
* porta cypher added
* porta cypher added
* commented in mixed keyword according to contrib.md