mypy

f404b16e - Properly account for `member` and `nonmember` in `TypeInfo.enum_members` (#18559)

Properly account for `member` and `nonmember` in `TypeInfo.enum_members` (#18559) Closes #18557 Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>