utils.manage_commands: Allow int values for create_choice

[hpenney2]

About this pull request

Very small change that allows for either a string or integer value to be passed to create_choice, instead of only strings.

Changes

• Changed type hint of create_choice to Union[str, int] instead of str

Checklist

• I've checked this pull request runs on Python 3.6.X.
• This fixes something in Issues.
  • Issue:
• This adds something new.
• There is/are breaking change(s).
• (If required) Relevant documentation has been updated/added.
• This is not a code change. (README, docs, etc.)

[eunwoo1104]

Merging, thank you for contributing!