Make Optional things Optional

[ihasdapie]

I combed through all 154 matches of = None in the codebase and made Optional things, well, Optional

Signed-off-by: Brian Chen [email protected]

[sloretz]

I'Il be adding to this PR until mypy is happy and help would be appreciated :)

This is a great effort! May I suggest doing this a few files or a few classes at a time? It's easier for us maintainers to review and merge a little bit at a time than to review a lot all at once. It will also mean you have fewer merge conflicts to deal with as other PRs go in.

[fujitatomoya]

+1 great effort 👍

[clalancette]

CI:

• Linux
• Linux-aarch64
• Windows