add tableflip spinner

[leifwalsh]

Description of new feature, or changes

Adds a spinner that looks like two characters flipping a table back and forth

Checklist

• Your branch is up-to-date with the base branch
• You've included at least one test if this is a new feature
• All tests are passing

Related Issues and Discussions

People to notify

[leifwalsh]

@manrajgrover need anything from me?

[manrajgrover]

@leifwalsh Thanks for working on this. Since this spinner is user contributed, I was thinking of creating a separate dictionary for user contributed spinners and combine them with cli-spinners before creating Enum. Can you make these changes and I can then review the code?

[leifwalsh]

It's not clear what you're asking for here

[d-chris]

@leifwalsh Thanks for working on this. Since this spinner is user contributed, I was thinking of creating a separate dictionary for user contributed spinners and combine them with cli-spinners before creating Enum. Can you make these changes and I can then review the code?

@manrajgrover i tried to tackle this task, but for development with following restriction:

• python ^3.8, would this be ok?
• i got some issues using pylint executing some base64 code, so i removed it from tox.ini. is flake8 also an option?
• nose is not longer maintained so i switched to pytest
• I received some warnings related to setup.py running tox, and I don't have much experience with it. Would switching to poetry be a feasible option?