mypy
maths/sigmoid_linear_unit.py
* updating DIRECTORY.md * Fix mypy errors in sigmoid_linear_unit.py * updating DIRECTORY.md * updating DIRECTORY.md --------- Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
* Implemented Swish Function * Added more description and return hint in def * Changed the name and added more descrition including test for sigmoid function * Added * in front of links