chore: test python312rc1

[vinitkumar]

• Update Python 3.12 to rc1
• Fix some ruff warnings

[codecov[bot]]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (e657e60) 96.66% compared to head (2eb82c9) 96.66%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #184 +/- ## ======================================= Coverage 96.66% 96.66% ======================================= Files 6 6 Lines 599 599 ======================================= Hits 579 579 Misses 20 20 ``` | [Files Changed](https://app.codecov.io/gh/vinitkumar/json2xml/pull/184?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Vinit+Kumar) | Coverage Δ | | |---|---|---| | [json2xml/dicttoxml.py](https://app.codecov.io/gh/vinitkumar/json2xml/pull/184?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Vinit+Kumar#diff-anNvbjJ4bWwvZGljdHRveG1sLnB5) | `91.59% <100.00%> (ø)` | | | [tests/test\_json2xml.py](https://app.codecov.io/gh/vinitkumar/json2xml/pull/184?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Vinit+Kumar#diff-dGVzdHMvdGVzdF9qc29uMnhtbC5weQ==) | `99.25% <100.00%> (ø)` | |

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.